apply for software update and ur total system will be renewed.thats how i did mine when i forgot my password. http://europe.nokia.com/A4176089

heres the link to download the update software and when its done use your data cable to connect the phone with ur pc by keeping your mobile on.the update takes around 50 minutes.i am sure it will work as it worked for mine.if you dont have the data cable for it then use the one provided with card readers.

my id is rhymeofbrooklyn06@yahoo.co.in