>Sounds like your Outlook is not installed correctly or at least not completely. The code should work as you have it, it is not necessary for Outlook to already be running.

Thanks Fred. I tried following Tamor's advice but I'm not very knowledgable about the registry so I didn't get very far. Instead, I've arranged for our system administrator to do a complete uninstall and reinstall of Outlook on my machine. Hopefully that will take care of it.