/attr always say unknown attribute when writing it good

[demon47]

Hello,
When i use the /attr command and i say as example: /attr attack, 40 it says: Unknown Attribute
With almost everything it says it, i use:http://otland.net/threads/10-10-the-forgotten-server-0-3.199331/
somebody can help? i've been looking and i think i have to add in functions, but it doesn't got it.
anyways thanks

 

[Cys9211]

say : /attr set integer attack "40

 

[demon47]

say : /attr set integer attack "40

Nope, doesn't work, i tried anything. But nothing i need to add it in THINGPROPORTIES, but where is that?