So I bought a new Macbook Pro, but still have my old mid-2009 MBP which has the full Adobe Creative Suite 4 (including Photoshop) installed on it. I finally located my 24 digit serial number from the old machine, downloaded CS4 again on the new MBP, but when I go to install it, it says that serial isn't valid. The software is legit and still works fine on my old MBP. Am I missing something as to why this won't install on my new machine? Is there something else I have to do? is there anything I can do to get it working??