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Image Verification is missing.

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I had this problem,
I just removed the HTDOCS folder and replaced it again.
 
m9aqgw.png
 
Try replacing it with the old one:
PHP:
<?php
/*
============================
QuickCaptcha 1.0 - A bot-thwarting text-in-image web tool.
Copyright (c) 2006 Web 1 Marketing, Inc.

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
============================
See settings.php for common settings. You shouldn't need to change
anything in this file.
============================
*/
include "imgver_settings.php";

// Keep #'s reasonable.
$min_thickness = max(1,$min_thickness);
$max_thickness = min(20,$max_thickness);
// Make radii into height/width
$min_radius *= 2;
$max_radius *= 2;
// Renormalize contrast
$contrast = 255 * ($contrast / 100.0);
$o_contrast = 1.3 * $contrast;

$width = 13 * imagefontwidth (4);
$height = 2.2 * imagefontheight (4);
$image = imagecreatetruecolor ($width, $height);
imagealphablending($image, true);
$black = imagecolorallocatealpha($image,0,0,0,0);

// Build the  validation string
$max = strlen($acceptedChars)-1;
$password = NULL;
for($i=0; $i < $stringlength; $i++) {
	$cnum[$i] = $acceptedChars{mt_rand(0, $max)};
	$password .= $cnum[$i];
}

// Add string to image
$rotated = imagecreatetruecolor (70, 70);
for ($i = 0; $i < $stringlength; $i++) {
	$buffer = imagecreatetruecolor (20, 20);
	$buffer2 = imagecreatetruecolor (40, 40);
	
	// Get a random color
	$red = mt_rand(0,255);
	$green = mt_rand(0,255);
	$blue = 255 - sqrt($red * $red + $green * $green);
	$color = imagecolorallocate ($buffer, $red, $green, $blue);

	// Create character
	imagestring($buffer, 5, 0, 0, $cnum[$i], $color);

	// Resize character
	imagecopyresized ($buffer2, $buffer, 0, 0, 0, 0, 25 + mt_rand(4,6), 25 + mt_rand(4,6), 20, 20);

	// Rotate characters a little
	$rotated = imagerotate($buffer2, mt_rand(-5, 5),imagecolorallocatealpha($buffer2,0,0,0,0)); 
	imagecolortransparent ($rotated, imagecolorallocatealpha($rotated,0,0,0,0));

	// Move characters around a little
	$y = mt_rand(1, 3);
	$x += mt_rand(2, 6); 
	imagecopymerge ($image, $rotated, $x, $y, 0, 0, 40, 40, 100);
	$x += 22;

	imagedestroy ($buffer); 
	imagedestroy ($buffer2); 
}

// Draw polygons
if ($num_polygons > 0) for ($i = 0; $i < $num_polygons; $i++) {
	$vertices = array (
		mt_rand(-0.25*$width,$width*1.25),mt_rand(-0.25*$width,$width*1.25),
		mt_rand(-0.25*$width,$width*1.25),mt_rand(-0.25*$width,$width*1.25),
		mt_rand(-0.25*$width,$width*1.25),mt_rand(-0.25*$width,$width*1.25)
	);
	$color = imagecolorallocatealpha ($image, mt_rand(0,$o_contrast), mt_rand(0,$o_contrast), mt_rand(0,$o_contrast), $object_alpha);
	imagefilledpolygon($image, $vertices, 3, $color);  
}

// Draw random circles
if ($num_ellipses > 0) for ($i = 0; $i < $num_ellipses; $i++) {
	$x1 = mt_rand(0,$width);
	$y1 = mt_rand(0,$height);
	$color = imagecolorallocatealpha ($image, mt_rand(0,$o_contrast), mt_rand(0,$o_contrast), mt_rand(0,$o_contrast), $object_alpha);
//	$color = imagecolorallocate($image, mt_rand(0,$o_contrast), mt_rand(0,$o_contrast), mt_rand(0,$o_contrast));
	imagefilledellipse($image, $x1, $y1, mt_rand($min_radius,$max_radius), mt_rand($min_radius,$max_radius), $color);  
}

// Draw random lines
if ($num_lines > 0) for ($i = 0; $i < $num_lines; $i++) {
	$x1 = mt_rand(-$width*0.25,$width*1.25);
	$y1 = mt_rand(-$height*0.25,$height*1.25);
	$x2 = mt_rand(-$width*0.25,$width*1.25);
	$y2 = mt_rand(-$height*0.25,$height*1.25);
	$color = imagecolorallocatealpha ($image, mt_rand(0,$o_contrast), mt_rand(0,$o_contrast), mt_rand(0,$o_contrast), $object_alpha);
	imagesetthickness ($image, mt_rand($min_thickness,$max_thickness));
	imageline($image, $x1, $y1, $x2, $y2 , $color);  
}

// Draw random dots
if ($num_dots > 0) for ($i = 0; $i < $num_dots; $i++) {
	$x1 = mt_rand(0,$width);
	$y1 = mt_rand(0,$height);
	$color = imagecolorallocatealpha ($image, mt_rand(0,$o_contrast), mt_rand(0,$o_contrast), mt_rand(0,$o_contrast),$object_alpha);
	imagesetpixel($image, $x1, $y1, $color);
}

session_start();
$_SESSION['string'] = $password;

header('Content-type: image/png');
imagepng($image);
imagedestroy($image);
  
?>

You will also need imgver_settings.php in the same directory:
PHP:
<?php
/*
============================
QuickCaptcha 1.0 - A bot-thwarting text-in-image web tool.
Copyright (c) 2006 Web 1 Marketing, Inc.

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
============================
Pretty much everything that you'll need to change/adjust
should be right here in this file.
============================
*/

// This string contains allowable characters for the image.
// To reduce confusion, zero and the letter 'o' have been removed,
// and QuickCaptcha is NOT case-sensitive.
$acceptedChars = '123456789';

// Number of characters in image.
$stringlength = 4;

// Where to go when the correct / incorrect code is entered.
//NOT USED IN SMART-ASS
$success = "success.html";
$failure = "failure.html";

// A value between 0 and 100 describing how much color overlap
// there is between text and other objects.  Lower is more
// secure against bots, but also harder to read.
$contrast = 100;

// Various obfuscation techniques.
$num_polygons = 0; // Number of triangles to draw.  0 = none
$num_ellipses = 0;  // Number of ellipses to draw.  0 = none
$num_lines = 0;  // Number of lines to draw.  0 = none
$num_dots = 0;  // Number of dots to draw.  0 = none

$min_thickness = 0;  // Minimum thickness in pixels of lines
$max_thickness = 0;  // Maximum thickness in pixles of lines
$min_radius = 0;  // Minimum radius in pixels of ellipses
$max_radius = 0;  // Maximum radius in pixels of ellipses

// How opaque should the obscuring objects be. 0 is opaque, 127
// is transparent.
$object_alpha = 95;
?>
 
Try replacing it with the old one:
PHP:
<?php
/*
============================
QuickCaptcha 1.0 - A bot-thwarting text-in-image web tool.
Copyright (c) 2006 Web 1 Marketing, Inc.

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
============================
See settings.php for common settings. You shouldn't need to change
anything in this file.
============================
*/
include "imgver_settings.php";

// Keep #'s reasonable.
$min_thickness = max(1,$min_thickness);
$max_thickness = min(20,$max_thickness);
// Make radii into height/width
$min_radius *= 2;
$max_radius *= 2;
// Renormalize contrast
$contrast = 255 * ($contrast / 100.0);
$o_contrast = 1.3 * $contrast;

$width = 13 * imagefontwidth (4);
$height = 2.2 * imagefontheight (4);
$image = imagecreatetruecolor ($width, $height);
imagealphablending($image, true);
$black = imagecolorallocatealpha($image,0,0,0,0);

// Build the  validation string
$max = strlen($acceptedChars)-1;
$password = NULL;
for($i=0; $i < $stringlength; $i++) {
	$cnum[$i] = $acceptedChars{mt_rand(0, $max)};
	$password .= $cnum[$i];
}

// Add string to image
$rotated = imagecreatetruecolor (70, 70);
for ($i = 0; $i < $stringlength; $i++) {
	$buffer = imagecreatetruecolor (20, 20);
	$buffer2 = imagecreatetruecolor (40, 40);
	
	// Get a random color
	$red = mt_rand(0,255);
	$green = mt_rand(0,255);
	$blue = 255 - sqrt($red * $red + $green * $green);
	$color = imagecolorallocate ($buffer, $red, $green, $blue);

	// Create character
	imagestring($buffer, 5, 0, 0, $cnum[$i], $color);

	// Resize character
	imagecopyresized ($buffer2, $buffer, 0, 0, 0, 0, 25 + mt_rand(4,6), 25 + mt_rand(4,6), 20, 20);

	// Rotate characters a little
	$rotated = imagerotate($buffer2, mt_rand(-5, 5),imagecolorallocatealpha($buffer2,0,0,0,0)); 
	imagecolortransparent ($rotated, imagecolorallocatealpha($rotated,0,0,0,0));

	// Move characters around a little
	$y = mt_rand(1, 3);
	$x += mt_rand(2, 6); 
	imagecopymerge ($image, $rotated, $x, $y, 0, 0, 40, 40, 100);
	$x += 22;

	imagedestroy ($buffer); 
	imagedestroy ($buffer2); 
}

// Draw polygons
if ($num_polygons > 0) for ($i = 0; $i < $num_polygons; $i++) {
	$vertices = array (
		mt_rand(-0.25*$width,$width*1.25),mt_rand(-0.25*$width,$width*1.25),
		mt_rand(-0.25*$width,$width*1.25),mt_rand(-0.25*$width,$width*1.25),
		mt_rand(-0.25*$width,$width*1.25),mt_rand(-0.25*$width,$width*1.25)
	);
	$color = imagecolorallocatealpha ($image, mt_rand(0,$o_contrast), mt_rand(0,$o_contrast), mt_rand(0,$o_contrast), $object_alpha);
	imagefilledpolygon($image, $vertices, 3, $color);  
}

// Draw random circles
if ($num_ellipses > 0) for ($i = 0; $i < $num_ellipses; $i++) {
	$x1 = mt_rand(0,$width);
	$y1 = mt_rand(0,$height);
	$color = imagecolorallocatealpha ($image, mt_rand(0,$o_contrast), mt_rand(0,$o_contrast), mt_rand(0,$o_contrast), $object_alpha);
//	$color = imagecolorallocate($image, mt_rand(0,$o_contrast), mt_rand(0,$o_contrast), mt_rand(0,$o_contrast));
	imagefilledellipse($image, $x1, $y1, mt_rand($min_radius,$max_radius), mt_rand($min_radius,$max_radius), $color);  
}

// Draw random lines
if ($num_lines > 0) for ($i = 0; $i < $num_lines; $i++) {
	$x1 = mt_rand(-$width*0.25,$width*1.25);
	$y1 = mt_rand(-$height*0.25,$height*1.25);
	$x2 = mt_rand(-$width*0.25,$width*1.25);
	$y2 = mt_rand(-$height*0.25,$height*1.25);
	$color = imagecolorallocatealpha ($image, mt_rand(0,$o_contrast), mt_rand(0,$o_contrast), mt_rand(0,$o_contrast), $object_alpha);
	imagesetthickness ($image, mt_rand($min_thickness,$max_thickness));
	imageline($image, $x1, $y1, $x2, $y2 , $color);  
}

// Draw random dots
if ($num_dots > 0) for ($i = 0; $i < $num_dots; $i++) {
	$x1 = mt_rand(0,$width);
	$y1 = mt_rand(0,$height);
	$color = imagecolorallocatealpha ($image, mt_rand(0,$o_contrast), mt_rand(0,$o_contrast), mt_rand(0,$o_contrast),$object_alpha);
	imagesetpixel($image, $x1, $y1, $color);
}

session_start();
$_SESSION['string'] = $password;

header('Content-type: image/png');
imagepng($image);
imagedestroy($image);
  
?>

You will also need imgver_settings.php in the same directory:
PHP:
<?php
/*
============================
QuickCaptcha 1.0 - A bot-thwarting text-in-image web tool.
Copyright (c) 2006 Web 1 Marketing, Inc.

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
============================
Pretty much everything that you'll need to change/adjust
should be right here in this file.
============================
*/

// This string contains allowable characters for the image.
// To reduce confusion, zero and the letter 'o' have been removed,
// and QuickCaptcha is NOT case-sensitive.
$acceptedChars = '123456789';

// Number of characters in image.
$stringlength = 4;

// Where to go when the correct / incorrect code is entered.
//NOT USED IN SMART-ASS
$success = "success.html";
$failure = "failure.html";

// A value between 0 and 100 describing how much color overlap
// there is between text and other objects.  Lower is more
// secure against bots, but also harder to read.
$contrast = 100;

// Various obfuscation techniques.
$num_polygons = 0; // Number of triangles to draw.  0 = none
$num_ellipses = 0;  // Number of ellipses to draw.  0 = none
$num_lines = 0;  // Number of lines to draw.  0 = none
$num_dots = 0;  // Number of dots to draw.  0 = none

$min_thickness = 0;  // Minimum thickness in pixels of lines
$max_thickness = 0;  // Maximum thickness in pixles of lines
$min_radius = 0;  // Minimum radius in pixels of ellipses
$max_radius = 0;  // Maximum radius in pixels of ellipses

// How opaque should the obscuring objects be. 0 is opaque, 127
// is transparent.
$object_alpha = 95;
?>

Doesn't work either;(
 
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