I recently bought a LG burner and a Panasonic DVD player. I am trying to back up my movies, and they work fine on my computer. They will play with no issues. But on the DVD player, some will play and others can't be read at all. I am using the Memorex DVD+R DL for for the back-ups I am doing now. Why would all of them work on the computer and only some on the DVD palyer. The player is the Panasonic DVD-S53K. Any help would be appreciated. Also, 4 of the 10 disk I have used so far have had some type of problem. Are Memorex dics not good? What are the best to use.