Can log into Wireless network (Linksys WRT54G router) from OSX and Windows but not from Linux

From Linux I can see my wireless network, and I set up the password, but it doesn't log in. I can log in from OSX and Windows Vista, but not from Ubuntu.

Any suggestions?

Logging onto Network from Llinux

Verify that you have picked the correct security version and then make sure that you have the ID spelled correctly (case sensitive)then verify that the password is correct. You have to have something misspelled.

Still Can't Log In...

Something is weird... my password works with my wireless network name and password on Vista and Snow Leopard, but with Ubuntu, I can't log in with the same network name and password... what's the deal? I'm using a WRT54G Linksys hub... Thanks for any help with this!