Ok I am getting a little pissed

Every time I try to log on to AIM I get the same message saying that there is something wrong with my internet connection. I have uninstalled and reinstalled AIM, scanned for viruses and spy/adware, even turned off my firewall. Nothing, I think that it is Tusco.net. Of course you talk to them and they just tell you that it is on your end and want to charge you to look at your system. It is just a little bit frustrating. If you really want to hear something funny, both Yahoo Messenger and ICQ work fine. To bad I do not use them anymore.