1.  Launch MS Project 2010.

2.  Click on File-> Info.  Select Manage Accounts.

3.  Click Add button in Project Server Accounts windows (Enter the URL & User name)

4.  Click OK.

5.  Select “Choose an account”.

6.  Click “OK” to close the Project Server Accounts windows.

7.  Click on File -> Exit to close the Project 2010.