nokia 3120

hi guys looking for help with security code of 3120. phone is already sim unlocked. it just went asking for sim even though sim was in it got new sim from same provider now its looking for security code tried 12345 cant remember if i changed it 1 morning with a hangover :-( have tried loads of different numbers i might have changed it 2 but no luck, tried masterCode calculator v1 by elektro255 still no luck, phone is old and battered not worth paying out to leave it in to be reset, any1 know any other software to generate mastercode. i know there is the nss software but dont have a cable. does that elektro calc usually work ???