Command Line – How to Change Wireless Password from Terminal

Hello I've recently installed Ubuntu 10.04 and entered a wrong password for my apartment's wireless network.

Upon entering the network options to edit the password it will allow me to delete it and rewrite but not to save,the save edit button disappears.

I have already tried deleting and recreating the connection but it starts up with the incorrect password already in,also restarting both my wirelesses and laptop have failed.

I feel I'm forgetting some permissions or something and that I should be able to change it from the terminal.

I will accept any solutions but please don't suggest upgrade to the newest edition there's a reason I'm running the old one.