Abhishek,
Sorry that you are seeing this issue.
Can you please give us some more information ?
1. Did you install the cordova.contacts plugin ? In the new Phone Gap Application Project wizard, you should check the ‘Contacts’ in the Plug-ins list to add it to the project. Alternatively, you can add the plugin to an existing project by right clicking on the project > PhoneGap > Add Plugin. You can select the plugin from the registry tab (cordova.io) registry, or from git or from your local machine.
2. Do you see any issues during the build ? Is it a local/remote build ?
3. If you are still seeing issues, please let us know what exact error you are seeing.