In my condo building we have wireless networks for each floor, but for some reason, while I can connect to it, with full signal strength, I can't get the internet to work. I've run diagnostics and it shows no problem with the internet connection, but when I try opening safari, no page will load, and eventually a message comes up that says as much, but without any guidance. My neighbor has the same macbook pro as I do with the same OS X 10.5.7. He's not having these problems. I went to a friend's house and am still able to connect to the internet through his wireless router. Any help on this?