DCOM Error

I am getting this error has anyone seen this error and know how to fix it?
Event Type: Error
Event Source: DCOM
Event Category: None
Event ID: 10006
Date: 7/17/2001
Time: 10:20:00 AM
User: FETCO-RD\Serviceadmin
Computer: FETCO-RND
Description:
DCOM got error “Class not registered” from the computer FETCO-EXCH when attempting to activate the server: {D99E6E73-FC88-11D0-B498-00A0C90312F3}