Ok so here is the deal, I downloaded the Adobe Master Collection from here, then after the 30 (actually more like 27) I got the key and entered it. It accepted the key, and then it went on to download file formats and effects and it then followed to say that it had failed. So now here I am, stuck without Keylight, all of the CC plugins etc. I'm running Adobe After Effects CS3 version 8.0. Can anyone shed some light on this?
EDIT: This is After Effects Professional Corporate.
You should contact Adobe Technical Support for help with issues like this. You are entitled to a certain number of free calls for "installation issues, basic usage questions, and troubleshooting unexpected behavior for documented features".
For information on what free technical support you're entitled to, see this page: