MSProject and visual studio 2010 problem

Hello, my problem is that i have ms project 2007 and visual studio 2010, i try migrate a work cronograma from visual  to ms project, but when i add task to the project, visual show me an stupid error "Argument of invalid type return." My boss say me that is missing a DLL, but he don't know which one.

Can anyone help me?? I am very desperate!!!