When I'm at home using my Airport Express, my wifi works flawlessly. However, when I'm at my girlfriend's house, it doesn't work at all. She's using a Belkin router and it works fine with her MacBook and my MacBook Pro. My iPhone says it's connected to her network, gives a full signal on the wifi icon, etc. but when I try to load a webpage, it tries and tries and then says "Safari can't open the page because it can't find the server.". Very frustrated! Any ideas? I can post the details from the wifi menu in Settings if needed.