Nokia N73 Cellular Phone "period work number key pad" Questions

...work cept this one.. someone please help me. hell there! I want u to try this small antidode get the key pad membrane cleaned which is under the key pad . coz some kind of carbon forms after a period ...

...work on code, example i give a password to my memmory card,it accept the password but when i go to memmory card it didnt request for code, i canenter in the memory card without demanding password.. ...