WE HAD A CD ROM WHICH WAS ASSESABLE PREVIOUSLY BUT NOW IT IS NOT ACCESSABLE IT IS SEEN IN POST IE CD ROM FOUND MESSAGE IS DISPLAYED ALSO LED INDICATER GLOWS WHILE CD IS INSERTED IN THE DRIVE BUT STILL IT IS NOT ASSESABLE,I HAD CLEANED IT EITH LENCE CLEANER CD BUT THE PROBLEM IS STILL THERE,I HAD TRIED VARIOUS CD’S STILL IT IS NOT ASSESABLE PLEASE HELP ME OUT OF THIS SITUATION