Enable Firefox Cookies to work with Y!A?

I'm asking this via IE 9, rather than the FF 4.0.1 that I actually use, because Y!A isn't allowing me to ask questions. I decided to send Feedback.. and was told to activate cookies. I didn't think that I'd ever deactivated them. Checked Options, and it says "Accept Cookies." Rebooted with no add-ons enabled -- didn't help. What do I need to do? Thanks.