Can't figure out why I can't get internet on my Airport express. It had work before, but now I cannot get a feed. My power book can read that I am getting a signal and i can used it with itune with my speaker but I can't seem to get on the internet any longer. I went to my brother's house and his airport express works fine. When I plug mine in at his place, I get nothing. . I have tried resetting to the default settings and upgrading the firmware, Still no internet. Can anybody shed any light.