Pendrive is right protected

Hello,
Sir myself Avinash Solanki
sir i was used my pen drive from winxp to another os version. afterwards it gives me an error that disk is write protected. i tried to remove or format but again it gives me prob that it is write protected and not able to format. i used different solutions but unable to format or remove write protected. please help me. how can i remove this write protection.

kindly mail me as soon as possible. my Pen Drive is Kingston DTI/512. and it has no any stick to remove write protected.