I recently got a new macbook, and I was able to connect to my U.S. Robotics router just fine. I could never do it on my iMac, I always got a "Error joining airpot "USR8054". Well, now that has spread to my iMac. No matter what, every time I try to connect to my router, I get a "Could not connect to airport "USR8054" ". Any idea on how to fix this? I can't go long without wifi.