In almost all cases, this issue is caused by not typing in the CPUID correctly into the support page form. If you're off by one digit, it will e-mail you back the wrong code. Please make sure you read all the digits from the screen correctly when you type it into the web page. Also, make sure you installed the full retail version of Drumagog, not just the update by itself. Sometimes re-installing the full retail version, then unlocking again will solve the unlocking issue. This is especially true if you re-named your hard drive, or moved/deleted some files that Drumagog needs.