Norton PC Checkup Not Working

I just purchased Norton Internet Security 2010.  Inside was a leaf that said I could go to Norton.com/FreeCheckup to scan my computer.  I installed it (or so I thought) and nothing happened when I tried to run the scan.  Nothing - no error message - nothing.  It is on my computer but when I click to open nothing happens.

Can anyone tell me how to resolve this problem?

 

Thank you.