Game Studio not recognising key

I have installed my key in the GameStudio folder and my license appears in the Help About in SED however when I try to run a programme I get a "Trial Period Expired" error and nothing further happens. I tried reinstalling but no use. I have installed Windows 7 Home Premium and GStudio is on a non system partition. What do i do?
Thanks

Well I finally figured out the problem. Ihad installed my A7 commercial key with an A8 install. Kicks oneself severely but figuratively Once I put the right key in the directory it worked (sort of).
Now the only problem is I get a complaint about not having PhysX even though I have version 9.10.0514 installed. Does having Win 7 64 bit make any difference?
Thanks
Matthew

Hi,

Perhaps reinstalling 3DGS would resolve the problem (Do you have two different keys for A7 and A8?).

Best regards.

Yes. I forgot when installing on my upgraded OS that there was a new key issued for the A8 version.