Forgotten lock code on nokia n70

Hello,

As my nokia E51 is severely damaged, I decided to use my old N70.
The problem is that last time I used it was 3 years ago and now when the phone turns on it asks me for the Lock Code.

Of course I dont remember the code and I have attempted many many times to remember and enter the code but no luck.

So, is there any trick that will let me format the phone or find the lost lock code?

Thanx in advance