Changed a website password and I want firefox to remember it instead of my old one?

I have firefox version 3. firefox remembered my password for a website but i changed it and whn i go to that website it only gives the old password.... how can i make it so it will remember my new password instead??Changed a website password and I want firefox to remember it instead of my old one?very easy go to tools options security saved passwords , delete the old one revisit the page and it will ask for the new one