Already used activation

I purchased through the internet, through the steinberg site, an Activation Code for Cubase Elements 7. Unfortunately, after experiencing some bugs with my plug-ins, I decided to uninstall and reinstall the software. The problem is that now, when activating, my E-licenser software says that the license downloaded has already been used and cannot proceed to run cubase. What now?

hi if you activated it when you first installed it then YOU have used the licence go to your steinberg account page and look for RE ACTIVATION and follow steps to get new code