NWDS installation problem

Hi

I just reinstall my NWDS 7.0.10 and it installed perfectly. When i start my developer studio, everytime a eclipse window comes with message "please wait... complete install". When i am trying to create a new composite application project, It creates all the DC perfectly but finally it give an error

Warning: ERA: META-INF failure :null

error in project creation.

Please let me know if anyone have any idea about it

Saurabh