I have been using Logic 9 to do a project Mac/Snow Leopard. Recently had to move to a different iMac, 10.9.5/. I had originally upgraded from Logic 8. When I try to load logic onto the new Mac, it asks for a serial number and directed me where to fine it. When I enter the number it says the number is incorrect and asks me for an original serial number or an SX key. Don't know what an SXkey is. Are they asking for the serial number from my original Logic 8?