Q. I just upgraded Gaim and the MSN plugin will not load. Why?
A. You did not compile with SSL support, or the SSL plugin failed to load. As of protocol version 9, the MSN protocol requires the use of SSL, which gaim provides by either GnuTLS or the combination of NSS and NSPR from the Mozilla project. Install one or both of these and recompile Gaim, and see the next question.
mmm... Google
wait... There's more!
oh boy instructions!
And according to the FAQ you can get both NSS and NSRP
here.
Google is your friend :P