Im having a bit of trouble with my key, its was cut properly and it opens the doors and it turns in the igniton.

But when it wont start the engine, it just cranks.

Anyone have any ideas what it might be?
I did use the spare key immobilser, so i might need to program the car to be used with this newly cut key again (it can be done on the car, the process is similar to setting the remotes for garage doors when they're first installed).
I read the procedure somewhere online a while ago, i need to find that post again.

That's the only thing i can think of.

Ill keep you guys posted.