Hans,
I have 2 computers here and I have the same issue on both. Graham sent me a document file yesterday with the calendar control and when I went to open it I get an error "Could not load an object because it is not available on this machine." That is not true MSCOMCTL.OCX is on the machine and registered.
Yes, creating a new user account does resolve the issue. However, it is simply too painful and I don't have time to customize a new profile just to have access to these controls.
Do you know of anything (some cleanup or repair) that could be done with my existing profile to fix this? Thanks for all your time and the suggestions.