Regarding flash memory is not recognized by any computer now?

Actually, i feel no one has still understood my problem. my flash memory used to be autoplayed on the computers and it would be shown in the My computer - Devices with removal storage. but all of a sudden it has stopped autoplayig & it would not be shown in the devices with removable storage PLUS when i attach it to any computer/laptop now, even the LED will not blink or show any sort of activity. Can anyone now help by providing a solution or by at least telling me what is wrong with it?