I am afraid this issue is off-topic in this forum. This forum is targeted at the VSTO technology. VSTO is a technology for extending the UI of Office 2003 and 2007 applications in the form of Add-ins and document-level customizations. The forum's PLEASE READ FIRST explains what VSTO forum is for. Since I am not a MS project expert, I don't know what all is going on behind the scenes, here. So I recommend you post this issue to project.develoer newsgroup, where there are more specialists, and you would probably get more helps.
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