Unlock parental code for Lemon 01 CI satellite receiver?

Hello, my question is does anyone have a method of overcoming a forgotten a Parental Lock function code for a Lemon 01 CI satellite receiver box. It is a four digit (numbers) code that has been forgotten. I would be very grateful if you could supply such a code or other method of clearing the memory for retuning the receiver. Thanks.

Donal.