[Help] Hp Recovery Problem

I m testing something on my pserver and I have a problem ; Hp recovery is going so high [ I cant kill boss like dios exel it recovers his hp 100k although i give 30k damage per time ]
How and where can I change it ?

I believe that some bosses HP will restore like that if your command "/attack on" is enabled. I know that the CS boss does that as well as CTI, so maybe try disabling your attack function "/attack off" and see if that resolves your issue.