[TippeX]

or just use the crack, works fine and no pesky starforce to deal with... (completed game, so crack is definately good)

The key thing (if its the starforce key) is based on media density checking etc and is pretty dependant / influenced by the particular hardware you have the disk in failing drives / bad disks can cause the key check to fail, contacting
starforce tech support might get you a different key though...so do as DABHand said and try (if you can to check in a different drive)