With Yahoo mail, my IM and Facebook no longer connects, they show but do not work? Haw can this be fixed. I'm runing Ubuntu 10.04 LTS & FF 9.0.1

For some reason, the new version of Yahoo mail that links with Facebook and Yahoo IM shows the connection, but when I click to connect to someone, nothing happens. When someone tries to reach me, I do not even know. I need to use the old mail site tat only links with Yahoo IM, then I can have connection. But... when I log out and back in with an other Yahoo address, I am back to the new, non-working site... so I close, then select the old Yahoo mail site... back working with only Yahoo IM... no Facebook  ?!? weird...