I just purchase my CF card last week and one the mist of taking pic for an event suddenly error message pop up CHA, i took out from the camera and slot it back still same error. Try other CF card, works pefect. I plug in the cf into computer and it didnt detect. Can anybody help how to get back the pic inside as it belongs to my client. Can anybody help how to format the CF card as it cant detect on camera or pc.