Having your Antivirus software un-activated when you are using P2P is asking for trouble. There are many - many Virus and Trojan files that use the P2P network to propogate and spread throughout the whole system. You are doing you fellow Limewire users a big disservice by not having your antivirus system active while you obtain files from off this network. You could well be the source of some of the many active virus or trojan files that have propogated on this and other P2P network. I would suggest that you use that AV program every time, and do a thorough scan right now of all the files that you have downloaded while you've had it disconnected.
Good Luck!