I was using my cousin's camera and while taking pictures " Memory Card Full" message kept popping up so while i was deleting the unwanted pictures from the camera another message popped up ( i was in a rush) so i must have pressed something else ... asking about the "write protection" and i had accidently pressed the "Yes" option" from then on i was not able to delete any pictures at all or take pictures at all. Please help ... the model number is VG-140, Digital Camera 3.6V (Olympus)