Sony 2GB Memory Stick PRO Duo Memory Card "media error reinsert" Questions

reinsert my memory card back in. i cant take pictures nor can i view them on the camera or on the computer or on the tv....does that mean ive lost the pictures? how can i recovery the card? I have had

i got the message "Your Disk is Write Protected" when i go to format. How i format my Transcend disk. Please help me. Thanks. Removing the write protection depends on the source of the problem. ...