Wireless Connection Airport


I have a problem with the airport connection

sometimes it doesn't find the network although it exists and work fine with all the other computers.

sometimes if it finds it it comes up with an error (can't connect)


I think I may be having the same problem. My computer connected fine, then I updated all the software, and it worked fine for a little bit. but, one day i came home and it can't connect anymore. It says "there was an error joining the AirPort network", but my PC and 4 other PCs on the network connect fine. I take my pbook to school and work and it connects fine there. I run the network diagnostic utility, and it says my home network needs a password, but there is no password encryption turned on, and none of the PCs need a password to connect. what's going on??