Get your taxes done using TurboTax

I have used the Turbo Tax CDs for years and have never had a problem.  Each year for the past several years I purchased from Costco and Walmart.  This year, I purchased my copy of Turbo Tax from Staples.  Every other year as soon as I put the CD in the computer, it has automatically come up Welcome to Turbo Tax as so forth but this year, I put the CD in the computer and nothing comes up.  How do I download onto my computer? I have an license code.