Ok here is my problem. I have been using limewire for years now and never had any problems with it till last week, for some reason it won't connect anymore. When I start it up it will say "starting connection" but it will never connect. Sometimes it will get 1-2 bars but after about 3 seconds it drops the connection again. I have tried disabling all my firewalls and that didn't help. I even bypassed my router and connected directly to the the internet with no router and no firwalls or virus protection and it still would not work. This makes me believe that it may be something with the ISP. But that port test page thing that's all over these forums worked fine. I even tried the newest version of basic limewire with another laptop using the same connection and it didn't work either. Also I tried downloading Frostfire, That had the same results. Please help me. Here is my specs:

Windows XP SP2
Windows Firewall, Avast antivirus
Wireless Broadband connection
Linksys BEFW11S4 Wireless Router
Connecting from home
I am using Limewire PRO 4.12.3
ISP is Wiktel