Leopard and Airport Connection issues

Hey Everyone,

I am in a bind here. I just did a clean install of Leopard on my Intel 1.83 iMac and can't get the thing to connect to my 802.11g Airport Extreme. My iBook G4 running Tiger works fine.

I have tried hard reseting the Airport Extreme, which allows it to be seen but I can't do anything except configure it, and when I do, it all goes to crap when I try to connect using Leopard.

I really need some help here, please.

Paul