Software :: Firefox And Password Manager Pop Up For New Site

Love this feature (because I'm all about convenience). But the first time I logged on to a specific new site, password manager popped up asking if I wanted it to remember my log on information. Instead of hitting "remember", I accidentally hit "never remember". It's driving me nuts because its the one site I visit every day, and can't figure out how to un-do it other than re-register under a new name, which would be too much of a hassle since it's my stock brokerage site.