I updated my Mac from 10.6.8 to 10.9.5. When I try using my Parallels 7, it gives me a screen that asks for my activation key along with my User Name and Password. When I enter them, the screen vibrates and nothing activates. I tried uninstalling and reinstalling Parallels, but it does the same thing. I don't think any of my information is incorrect because I have printed it right on my parallels disk. What should I try next?