Input file is not supported by Microsoft(R) Office PowerPoint Error Message

Hello!
I have recently upgraded from windows xp to windows 7 operating system as well as also upgraded Microsoft office to version 10, and now I am facing the problem with NERO 11 which I was recently upgraded from 10 version as at the time of importing the Power Point Representations I am getting the error message as in figure below and I am confident that the files are not damaged as used same for the previous so kindly provide me the solution for this problem.
Thank you.

Nero Vision
