Redemption "COM class factory" error

I have a web application which uses redemtpion to create a .msg file and pass it to the user.  I am getting the following error:

Retrieving the COM class factory for component with CLSID {29ab7a12-b531-450e-8f7a-ea94c2f3c05f} failed due to the following error: 80040154.

On this line:

Dim session As New Redemption.RDOSession

The code works fine on 3 servers in 3 different environments, but throws this error at a new client site.  My research leads me to believe that this is some kind of security/permissions problem but so far I have not been able to nail it down.  I have registered and reregistered redemption.dll, also checked the permissions on the folder where it is located to make sure aspnet, network service, users, domain users, all have full rights.
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rerardAsked:
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rerardConnect With a Mentor Author Commented:
The client installed Oulook on the server, which resolved the issue.  Our internal server does not have Oulook but it does have the exchange CDO so I think redemption requires one or the other.  
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RimvisCommented:
Hello rerard,

80040154 means "Class not registered". Did you install Redemption on the client?

Regards,

Rimvis
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rerardAuthor Commented:
Yup.. installed redemption, and when that didn't help I also tried to register the dll manually via regsvr32.
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rerardAuthor Commented:
Is it possible that redemption is being blocked by AV software, there is no indication of this but I am grasping at straws.
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