Quicktime Pro 7 Registration Key

I purchased QT 7 Pro on my old Laptop, but it FINALLY died on me. So I had to buy a new one. Once I bought my new laptop I started the process of reinstalling all programs and whatever back on to it. I have been trying to get my QT 7 Pro back wiht no success. I recovered my registration key from my Apple online account, attempted to input it in & it tells me that its an Invalid Registration. What do I do? How else do I get this back? I am not paying AGAIN!