[AccessD] Automation error with Outlook 2003

Folks,

I have an app developed in Access 2002 that sends html formated e-mail using
outlook automation.  The app works fine on my computer; WindowsXP, and
AccessXP Developer.  The app runs fine on another computer we have with the
same operating system and OfficeXP.  Tested it on a computer with WindowsXP
and Office 2003 and now I am getting an "error -2147024770(Automation Error.
The specified module could not be found.)".  My code uses late binding since
I can not be sure what version of Outlook folks will have on their
computers.

The Code is as follows.
------------------------------------------------------
Dim oOut As Object
Dim mItem As Object
   On Error GoTo WriteMessage_Error
   
            'create new e-mailitem and display without sending
        Set oOut = CreateObject("Outlook.Application")
        Set mItem = oOut.CreateItem(0)
---------------------------------------------

The error occurs on the line with CreateObject.  I have done some searching
on the web for this but can not find any specific causes.  

Any help greatfully appreciated.

Doug