My DM500S receiver, bought few weeks ago and still very new, with all the firmwares and images that has been erased away and left it empty-handed without any images after downloaded it so carelessly. Yet I have no experience at downloading issues after made it via USB at end and RS232 at other end. Probably the main reason that my PC computer is Fujitsu FMV Deskpower K8/120WLT model that has no RS232 plug-in equipped and it's too Japanese !! So I am asking you who have great knowledge of downloading any requested firmwares as that would be of great help as concerned. I'd be positively happy to pay you to have it done at no time. Please pm me if you are willing to assist me to go thru with it. Thanks.