Really need some help today!

[Biz-z Z]

A couple of things come to mind:

1) Not only do you have to depress the clutch, you must depress the brake firmly and then turn the key. (car in neutral, of course)

2) Presuming yours is the transponder type key, (the kind with an electrical component in the key grip), according to the 987 manual, if the ignition is left on for more than 2 minutes without starting the engine, the immobilizer is reactivated. To switch it off, insert the key into the ignition lock and turn the key all the way to the (furthest) left position ( “11 o’clock,” as it were) before starting the engine.

Hope this helps.