BalajiKsisa,
Your issue appears to be outside the scope of the Genuine Advantage forum. It's possible that what you are seeing is the reduced functionality mode for Office Enterprise 2007 in which case you will need to either uninstall the trial version and if you wish, install a genuine MS Office product or convert from the current trial version you have.
Information about activation and conversion of 2007 Microsoft Office system Trials can be located on the following webpage: http://office.microsoft.com/en-us/help/HA101936151033.aspx
Lori MS