If You want to buy click this link below:
Football Manager 2009 (PC / Intel Mac)
But if you have trouble with product key "invalid":
FM09 - Football Manager (FM 2009) error product key already active. The solution is you need to delete the certificates and re-activate the game.
1) On receiving the error, please uninstall the game
2) Please navigate to the following directory:
XP users: C:\Documents and Settings\All Users\Application Data\Sports Interactive\Football Manager 2009 Certificate
Vista users: C:\Program Data\Sports Interactive\Football Manager 2009 Certificate
3) Please ensure that it is the \certificate directory you are located in
4) Delete all content
5) Reboot the machine
6) Re-run the installation program and retry activation - ensuring you have 'verified' your key using the following website:http://keylookup.fm2009.softanchorinsight.com/
7) You should now be activated
