Thanks for you help.
It ended up being a prob with my Winsock in the registry. After 6 days of struggling to get connected with SBC and after about dozen calls to customer support, I found this by myself.
I deleted couple of winsock entries in my registry, unbound tcp/ip from my NIC and rebooted. rebound tcp/ip, reboot, and voila.
Apparently, the install CD from SBC corrupted my winsock.