Can you provide more detail on what you are seeing? You enter the serial number and then what happens? Are you getting any indication that it is an invalid license? We hear this from time to time: it was an educational license, or even after working for years, was determined to have been from a pirated source. MIT, support has answered such questions incorrectly before. It has been some time since I last reinstalled, and needed to activate CS6, but I am having no problems, and do not recall this. Can someone provide an official statement that CS6 activation servers are gone? I have not heard that.