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Automation Open error - "ClassFactory cannot supply requested class" (-2147221231)

I am trying to use a third party COM object.  I have been provided with a comobject.DLL file and I have registered the object.
I have been able to use the COM object with no problems using a VB script.
 
Now, I need to be able to use the COM object from LabVIEW.
I created an Automation Open function ( Functions > Connectivity > ActiveX > Automation Open ).
I then selected my ActiveX class from the Automation Open menu and created a Refnum.
Unfortunately, when I execute the VI, I get the following error:
 
"ClassFactory cannot supply requested class in activextest.vi"
 
I am using LabView 8.2 on Windows XP.
 
NOTE: I am able to create an InvokeNode function and see the available methods for this COM object.
 
Any help is greatly appreciated.
 
Thank you in advance.
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