My 13-inch MacBook from 2008 will not connect to the wireless network. It worked last week, and then they installed a new router and it stopped. My coworkers (with Dells) are fine. There is no new password or anything. Any suggestions? I've got Mac OS X Lion 10.7.4 as my software right now. My computer will still connect to other wireless networks, so it isn't a problem that I can tell with my Airport.