My daughter is running 10.6.2 on her Macbook. Yesterday she was connected to a web site. She left her computer and came back later to view the site again. When it attempted to load a video on the site she lost her internet connection (via a router and dsl modem that I also use with my iMac). She has been unable to reestablish her connection to my wireless network. (My iMac connection is working fine.) We have tried retyping the router password in the keychain and in Network preferences. No luck. This happened once before and she ended up having to restore her hard drive from TimeMachine. What's going on?