Please help me to understand what I may be doing wrong here - if anything. I just got this DVR & am quite pleased with what I've seen so far. It is replacing a Sanyo DRW-500 which IMHO is a piece of crap due to its many design flaws. Regardless, I went to Liteon's website to look for upgrades. They are some; but I've been unable to get them to open. I hope that some one has already been through this & solved the puzzle. When you open this link: http://www.liteonit.com/DC/english/download/index.asp It directs you to enter the S/N in the boxes. My Liteon is the version pictured at the bottom. I've entered that S/N "0102-0143-0063-F2FC" various ways/numerous times but it always rejects it since it says it's a bad number. As a test; if I enter the S/N for the upper version, it opens OK. To me, there is something wrong with this picture! Your help will be much appreciated. Best regards.