a while back i bought a five pack of memorex dvd+r. i tried repeatedly to burn using them and most of the time it would work. but when i decided to play the burned dvd on my dvd player, it wouldnt work. then when i told someone at work about it, she said that she had the same problem so she bought sony dvd+r. well, since my computer is compatible with both dvd+r and dvd-r, i boutght a 15 pack of sony dvd-r and burned a dvd. well, that one worked in my dvd player just like i was told. anyone have an idea why this is happening with memored dvd+r and dvd-r disks?