Thanks Anton
I updated to the latest slime and now it works.
I updated using the following file : http://common-lisp.net/cgi-bin/viewcvs.cgi/root.tar.gz?root=slime&view=t...
However, it did not work when I updated with the following command : cvs -d :pserver:anonymous:anonymous@common-lisp.net:/project/slime/cvsroot co -rFAIRLY-STABLE slime