Today after getting back from honeymoon I had to change the battery on my S reg 1.8 diesel. I dug out the security code to activate the stereo and entered it but despite several attempts and checking it is the correct code as written in the handbook. The stereo isn't liking it and i have a 30min delay until I can try again. Is there something I am missing here, do I enter a blank digit to begin with or something odd like that. Any help appreciated.