I just bought a Inspiron 6400 with the Intel wireless pro 3945ABG built-in card. I can connect to my home network, starbucks, etc. I cannot seem to connect to my work wireless network. It has an open network with no encription. Anything can connect except me. I can connect to it with a USB linksys adapter but not with my built-in adapter. I have good knowledge of computers but can't seem to figure this out. Any help will be appreciated.