Macbook Pro wont connect to a specific network

Hi,

Ive found this question on a lot of forums all over the net but so far ive gotten no good answer!

My dads macbook pro does not want to connect to a network at home, my macbook connects perfectly as well as my old iBook G4. The MBP detects the network but after he enters the password it says it couldn't connect. Ive tried turning of both the MBP and the router in question without any effect.

I would be happy if you could give me any sugestions!


Thanks

Did u set up the MacBook and the iBook - is there any access control set on those 2 units?