Remember, bans from servers/networks have nothing to do with mIRC. That's down to the scanners that the networks use to detect if people are infected. See
this thread for further info.
Also, it's not possible for any one virus scanner/trojan scanner etc. to detect everything. It's always good to use several for best results. There are many resources on top of sparta's suggestion in
this thread, make sure you read it all.
As the former thread says, if you still can't connect, you're going to have to contact the network administration - you'll find lots of info and links at
www.quakenet.org Hope you get back on soon!
Regards,