MSDART.DLL Entry Point

None of the usual responses to this work for me, so I am hoping for some enlightenment.

Starting Outlook 2003 I get the dialogue headed:

Microsoft Office Outlook: OUTLOOK.EXE – Entry Point Not Found

with the message

“The procedure entry point _GetIUMS@4 could not be located int he dynamic link library MSDART.DLL.”

I have to dismiss this dialogue 7 times before I can use Outlook.

I have the latest update to XP SP2; I also have the latest msdart.dll (v2.81.1117). MDAC 2.8 won’t install as its fucntions are apparently already covered by my version of Windows.

Grateful for help