Well I switched my password type for my wirless router to a WEP, not when I switch it back to a WPA2 it won't let the laptop's work. When I switched the IP number in setup I can't get back to Basic Setup..HELP!

hit that little master reset button on the front (the lit up logo) and it should reset the router to all defaults.
next time dont tinker with it so much, WEP is fine and is the least problematic. noone can hack it easily unless they know your password