Remove a snap in in Computer Management Console

Using SQL Express 2005, Windows XP, Office ent 2007

My Computer, Management, Expand Services and Applications, you get an error

messages:

Snap-in Failed to Initialize.

Name: Microsoft SQL Enterprise Manager

CLSID: xxxxxxxxxxxxx

Enterprise Manager is from an old SQL installation that has been removed and

replaced with SQL Express 2005. How do I get rid of this error message?

THanks

bob