i was using memorex 4x to burn dvd i kept having problems with write errors then i bought memorex -rw 2x didnt work ;oneday i was checking my region there was no region selected so i selected region 1 then i copied on memorex -rw 2x it copied i tried playing it would only play on my dvd writer and no where else so i went and bought tdk -r2x it stopped coping at 87% but it played that 87% on my tv dvd so i copied another movie on memorex -rw2x it copied but it would play on my writer and no where else why is it only copying on -rw and not -r thanks