I have a gateway laptop. I just put windows XP on it. It was working good. I have a Cisco AE2500 to get the wireless to work. Was working good but now stopped working on the wireless. The window pops up and says I have wireless networks in range but now I can't see any of them when I click on the box. Also has a red X on the wireless box. Was working great the other day, Computer works fine when hooked up with a LAN. I have tried to reinstall the adapter and it says i is ok. Could the USP Port be bad?