va2k,
I assume you where running an anti password hacking script on your sever right?
If not, it's like leaving the keys to your house under the matt.
Try this one.
http://www.stopthathacker.com/ Works like a charm.
If you don't want to use an anti password hacking and trading script you better get use to it. It will happen all the time.
Hugs,
Danielle