Hi Nitin,
1. Use a business user
2. Sometimes, you need to log off and log in again to be able to see the new WorkCenter and WorkCenter View.
If the problem is still not solved :
How did you create your screens?
By using "screen scenario with navigation" or one by one?
If you are new to object based navigation , I recommand you to use screen scenario with navigation.
If the problem is still not solved :
Create a BAC elemnt and deploy the solution.
Please refer to the studio documentation.
Hope this helps,
Fred