[Help]DoMeleeDamageMVPCallback

Hi everyone. I thought i should post this error here, since no one seems to be able to help me on other forums or anywhere else.

Well, now to my problem.

The world server crashes after a few minutes, because of the DoMeleeDamageMVPCallback, and that's pretty annoying. I can't seem to find out how to fix it. First i thought i should empty dwAtk1, dwAtk2 and dwAtk3 in the Data_monster table. It worked, but, the monsters did not attack anymore.

Is there any way to fix this problem and make the monsters still be able to attack?

Thanks in advance,
HolySinX