WRT300N Problems

I recently obtained a linksys wireless WRT300N that was set up with a Windows computer and is functioning however I have not been able to connect with my OSX powerbook. I can see the network in the dropdown airport tab and when i enter the password all i get is an error messege that i am unable to connect. Does anyone have any suggestions about how I can get this to word? Thank you

I recently purchased a WRT 350N and had nothing but problems with it. It had a USB port for "Storage Link" similar to the Airport Extreme but it was a pain in the *** to setup. And I've had 4 WRT54G series router previously as well. I ended up going back to the AEBS. Much simpler setup.