i need help! i have a benq 1620 and when i try to burn iso's on to a single dvd+r/-r i get error 1/4 of the way. the brand i tried is taiyo yuden +r,plextor +r, memorex -r they all fialed. i was partly sucessful when i put the iso's in a dvd size iso and burned it with alcohol but when it reads the data there well it was there the first time i checked to see if it was there but then nothing. the software i tried nero and sonic with no sucess. please help!