I just installed the YLF Collect Bookmarklet, but when I try to use it, I get this message:

Please log in to YLF before using the bookmarklet. You can log in to YLF in a separate window and then come back to this page and try the bookmarklet again.

I have tried logging out and then back in to YLF, and I still get the same message. I even tried collecting from a different retailer, thinking maybe it was the site. I'm a total newbie at using this, so what am I missing?