Can you enter pin number when unlocking keypad?

[alx100]

Hi,

What i want to do is when i unlock the phone/keypad on my i8910, (using the button on the side), i want to be able to enter some sort of pin number in order to unlock it.

Is this at all possible?

I have looked at the phone and SIM security settings, and put a number in the "lock code", assigned a number, but it does not seem to work?

Thanks and look forward to replies.