You just have to play with it with a little force. Put the key in all the way and turn it left hard and try to open. Go all the way right, then back, trying a different pressure, etc. Once you finally get it open make sure the screws on the inside are tight. If it's a little loose, it can mess it up.
'06 Cic ZHP, Southern California
ZHP Performance Package, Cold Weather Package, Leather, Jet Black/Black/Black Cube
Active Autowerkes Tune, Sprint Booster, BMW Performance Air Intake
DICE Ipod, Parrot/Connects2 Bluetooth, StealthOne Valentine Module
BMW Performance Strut Bar, Orion V2 Angel Eyes, No-holes License Plate