Please help: I have comcast high speed internet and a wireless card (Sierra 881). I have issues with my wireless PC card disconnecting on me. I mainly use the PC card when I'm traveling, but when at home I'll use Comcast. My problem is that when I'm at home and I try to use my card, it will disconnect on me after about 20 minutes. What is the problem? Is this due to me using a wireless network through comcast and then a wireless network through AT&T? Should I change me network settings? Is there a discrepancy there? I love my comcast internet but this pc card is giving me hell. lol..any suggestions?