Hello, I could use some help on an issue Autodesk Inventor 2013 has been giving me. Whenever I try to activate my product from the activation screen on running the program, I get an error saying my serial number is invalid. Next I tried to use the manual activation link at the bottom of the page when it rejected my number, and this accepted my serial number, but rejected my product request code. I sent a customer service request to Autodesk, but all I got was a reply saying that my product request code was invalid. Seeing as I wasn't provided with any further options than trying again (and believe me, I have), I just gave up on that. So now, if someone could help me out, that would just be tremendous. I've installed Inventor 2012 without any issues at all, but need 2013 because my CAD classes have just upgraded, and I won't be able to transfer files from 13 to 12. Using Windows 7 home premium 64bit, if that helps. Oh, and my trial has expired because my license wasn't activated within thirty days.