How to fix my problem with bearshare logon

My bearshare account was working fine. But when I changed my antivirus, there was something wrong everytime I logon. My computer freezes for what seems to be a lifetime until I manually reboot it. I tried to bring back my previous antivirus but the problem is still there. Is there something wrong with my antivirus or with the bearshare logon? How do I fix this?
