My key won't turn the ignition switch. '96 9000 CS, no signs of trouble prior...occasionaly would be difficult to turn the key, but rotating the steering wheel would release pressure. Now, I get a solid hit - no key rotation. I've tried moving the steering wheel, the gear shifter (automatic) and have tried rocking the car - no change. I've also sprayed WD40 and heated up the cylinder w/ hair dryer...Thanks for any suggestions.