Ghost 15 in XP pro service pack 3

I needed to reimage my PC, laptop, recently.  I then installed Ghost 15, previously used Ghost 14 and when trying to install it- an error indicating No Mapping between account names and security ID's was done-so I installed Ghost 15 and got the following message when the Welcome to Norton Ghost screen which had the 4 green checkmarks and the function performed by each with Next-Cancel at the bottom of the window.  When I click on Next, I get the error message --- You do not have sufficient Privileges to perform this operation.  See help for more info. about security messages.  Clicking on help does not provide answers.

Any Ideas