you have to turn it left then turn it right then hold it there then stick your hand inbertween the bonnet and grill and pull the leaver up (while still holding the key right)

(sorry im half asleep so my brains not making sense of things at the min, in on night shifts and anit slept since yestarday)

if your problem is the lock its self is jammed, im going to have to have a think about how to get in anther way for you without damaging the car.

give me half hour and ill get back to you if thats your problem.....