I've had this this DVD player almost six months. It was working fine until this week. I put a DVD in and it started skipping and then stopped playing altogether. I tried another disk, one that I'd used before with no problem. Bt all I got was a message that the disk couldn't be read. Same thing happened when I tried using this special disk for cleaning the laser lens. Can anyone help me? I don't want to do anything to my DVD player unless I know what I'm doing. Thanks in advance.