LD then unable to use internet connection until cpu restart

[Azzbad]

After searching many o' threads I cannot find the answer (or if others have the exact problem).

My home internet (ATT U-Verse) allows me to connect to the server just fine and sometimes play upwards to 3 hours with problem. Generally within 45min (+/- 30min) I go LD and have to exit out of the game. When I exit out of the game the internet no longer works on the computer until I restart the machine. This doesn't happen after zoning or not zoning etc.

I thought for sure that this was a computer issue BUT I ran a test at another place (not work *cough*) and I stayed logged in the entire 12 hours, 4 days in a row.

Anyone have any thoughts?

Both connection were wired
Windows XP
Followed all direction for the install
Titanium Client