Scenario:
When you have Microsoft Project 2007 and 2010 installed on the same machine, you will not be able to connect with Microsoft Project 2010.

Resolution:
Please follow the below mentioned steps to connect Integration manager with Microsoft Project 2010.

  • Launch Microsoft Project Integration Manager.
  • Click on Configuration tab.
  • In the Microsoft Project configuration section, select Project 2002/2003.
  • Click Save.
  • Logout and login to Microsoft Project Integration Manager, which will now connect to Microsoft Project 2010.