Deploying a Project 2010 VSTO add-In using Windows Installer

Hi,

I created a Windows Installer for a VSTO Project add-in as described in this article:

http://msdn.microsoft.com/de-de/vsto/ff937654.aspx

The installer completes successfully and creates the required registry keys. But after installation the add-in is not loaded by Project Client and is not listed under Options->Add-Ins.

I created the registry keys for the Project add-in as described in the article. I also tried an example of an Excel add-in and it works.

What could be wrong with the installer besides the registry keys?

Thanks,

Clemens