I tried calling IB and Verizon about this but nobody could help me. I'm able to log onto Webstation but I can't log onto TraderWorkstation. After speaking with technical support at Interactive Brokers, the guy told me it was a firewall issue. Somehow I'm restricted from accessing my TCP IC Ports 4000 & 4001. I tried to disable my Windows Firewall and my AVG Anti-Virus but it still didn't work. I called Verizon but they were no help. Did anybody else have this problem? Please help.