Hi padmanaban,
You need to give more information please.
Please state what actions you've taken to localise the cause?
For example:
Have you replaced your selected Menu with a completely different one?
Please provide a screenshot of your edit Workspace and details of the Menu selected/changes you've made?
Guide to assist you:
http://forum.cyberlink.com/forum/posts/list/7958.page
Please provide Part A,B, E&F(for screenshots)
Members may be able to assist if you can provide more data.
Dafydd