I'm afraid you're going to have to be a lot more specific. Debugging someone else's code in mIRC is hard enough, but debugging someone else's DLLs is extremely hard. Did you try debugging the code? Trace exactly what happens from the moment it's called to the moment it crashes. You should be able to find some problem then.

DALnet #Helpdesk
I hear and I forget. I see and I remember. I do and I understand. -Confucius