Adobe Audition 3.0 Cannot open it

I downloaded Adobe Audition 3 from Techspot using the Windows Code that was put up. After I downloaded it I tried to open up the program but it said that current user account does not have the privileges to perform product activation. Run this application from a user account with administrative privileges or contact your system administrator. I was wondering what else I needed to do as I must have done something wrong along the way to get the program running. Please can anyone help?

Regards

Keith
 
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