I bet you try to upgrade directly from MOSS Beta 2 – to – MOSS final. And now you’ve MOSS final. So, please do following,
1. Uninstall MOSS final
2. Install MOSS Beta 2 TR, and do similar procedure to this article (in this case the content database will gradually upgrade from Beta 2 – to – Beta 2 TR)
3. Install Uninstall MOSS Beta 2
4. Install MOSS Final, and to the procedure in this article (in this step you gradually upgrade from Beta 2 TR – to – MOSS Final)

Hello

When I try this I get the message:

This database is from a pre-release version of SharePoint Products and Technologies that cannot be upgraded.

Any ideas?

Cheers
Bruce