[EXP RING] problem with exp stage..

[ziomek14b]

HI! i have this

<movevent itemid="6301" slot="ring" type="Equip" event="buffer" value="
local rates = getPlayerRates(cid)
doPlayerSetRate(cid, SKILL__LEVEL, rates[SKILL__LEVEL] + 1/2)
"/>
<movevent itemid="6300" slot="ring" type="DeEquip" event="buffer" value="
local rates = getPlayerRates(cid)
return doPlayerSetRate(cid, SKILL__LEVEL, rates[SKILL__LEVEL] - 1)
"/>

and problem is that its giving to much exprience... and i have exp stage set to this..

<world id="0" multiplier="1">
<stage minlevel="1" maxlevel="80" multiplier="200"/>
<stage minlevel="81" maxlevel="120" multiplier="150"/>
<stage minlevel="121" maxlevel="150" multiplier="100"/>
<stage minlevel="151" maxlevel="200" multiplier="60"/>
<stage minlevel="201" maxlevel="250" multiplier="40"/>
<stage minlevel="251" maxlevel="300" multiplier="20"/>
<stage minlevel="301" maxlevel="350" multiplier="8"/>
<stage minlevel="351" multiplier="4"/>

can someone tell me how to make exp x2 with this all stages when i put ring?
so example.. when i have lvl 80 exp with ring is = 160
when i have level 250 exp with ring is - 80??
so when whatever exp its doubled.

rep for help+++++