On Friday I spent some time for investigation of ActiveX versioning issue when it is installed using msi package. This msi package registers the ActiveX control as a COM server using regasm tool.
The problem was the version part of the codebase attribute did not work properly. I have found some similar complaints at different sites.
As a result there is a need to create a registry key:
where default value is the version referenced in the Html (decimals replaced by commas).
Per-user, this value is at:
NOTE: You have to create this key, regasm does not create it.