Try starting the setver in debug mode
/usr/lib/dirsrv/slapd-instance/start-slapd -d 1
Nope that doesn't work but as it's a 64bit virtual instance the command
below seems to work
/usr/lib64/dirsrv/slapd-sso/start-slapd -d 1
Appears to work up until
[05/May/2009:20:04:33 -0400] - add_created_attrs
[05/May/2009:20:04:33 -0400] - => send_ldap_result 0::
[05/May/2009:20:04:33 -0400] - <= send_ldap_result
[05/May/2009:20:04:33 -0400] - Fedora-Directory/1.2.0 B2009.091.197
starting up
[05/May/2009:20:04:33 -0400] - Failed to create semaphore for stats file
(/var/run/dirsrv/slapd-sso.stats). Error 38.(Function not implemented)