Everything was working fine on my central primary site server (SMS2003) until just now I tried to connect via MMC from my laptop and it says "Connection failed". I tried it on the site server itself, same thing. I checked using wbemtest.exe to see if there was an issue with getting to the WMI repository, but it enumerates classes and instances fine. I stopped and restarted SQL and SMS_Executive. What else should I check for?