For years I have been burning discs for playing on friends' and relatives' players. I use 2x speed dvd's and burn on the slowest speed which has been the answer until now. I made a dvd for a freind who has a Toshiba SD-2200 player and it will not play. The message indicates "disc error". The dvd plays ok on their computer and my 15 year old player. Any suggestions for what I should try next?