I am trying to set up a Airport Express in my dorm room. The dorm people gave me an IP Address, Subnet Mask, and Router Address. When I set up the Airport Express I enter this info and connect via "Share public IP Address", it connects and I get a green light, but when I connect my laptop never works with the internet. It can connect to the base station, but no web pages load. So, I tried switching it to Bridge Mode, and my laptop connected and the internet worked. But, when I try to connect any other device (friends computers, my iphone, my nintendo dsi) they all either refuse to connect entirely (nintendo dsi), or when they do connect (iphone, friends computers), they do the same thing my laptop did in the other mode (connect but not load web pages). So what am I doing wrong?