Exchange 2003 : Message tracking not working

The first day I joined AO, I found this problem on their one and only exchange server.

Server info
============
Exchange 2003 SP2.
Tried to use message tracking center but it generates the error:
" the search could not be completed. Check to see that the Microsoft Exchange Management service is running on all Exchange 2000 and Exchange 2003 installations."

Verified that
1. WMI service is running
2. Exchange managment is running
3. Exchange services running using Local system account
4. Under exchange services > properties > log on > interact with desktop is unchecked.



Looking at the message track log path (Log File Directory text field), it contains the below error:
"An error occurred during a call to Windows Management Instrumentation

ID no: 80041013
Exchange System Manager"

==================================

The message tracking log path becomes normal for a while after reboot, but it will later return the error again.

Discussion on technet suggested that this is a problem with WMI. Hence re-registering the DLLs is the way to go:

mofcomp.exe -class:forceupdate C:\WINDOWS\system32\WBEM\exmgmt.mof
mofcomp.exe -n:root\cimv2\applications\exchange "c:\winnt\system32\wbem\wbemcons.mof"
mofcomp.exe -n:root\cimv2\applications\exchange "c:\winnt\system32\wbem\smtpcons.mof"
mofcomp.exe -n:root\cimv2\applications\exchange "c:\winnt\system32\wbem\msgtrk.mof"

Restart the Microsoft Exchange management service and WMI service.

After registering the DLLs and restarting the server. The message tracking is back to normal.

=========================================

NO IT DOES NOT WORK!
after a few days. the error will come up again. and message tracking will fail again.

Suspecting that when doing a message tracking search, something trigger the error to occur.

Related links:
Technet Discussion