Lee, do you have WebI SDK?
When I was playing around with this last summer, I found out that there were different values in the syntax for non-SDK installations. And the syntax you present looks like it might be the SDK version – although I think Steve said the syntax may have been switching around in the last couple of service packs.
At any rate, here is a post with they syntax that I was able to get working without SDK.
Anita Craig 
(BOB member since 2002-06-17)