I have used these in the past and no problems but my dvd drive stopped on my pc so I was advised to buy a portable LG multi drive GPO8. I have installed it etc, and it burns data dvd's fine but won't burn a dvd that is playable on my sony dvd player. DVD Flick & ConvertX will convert the files but when it comes to the burn stage, convertx stops responding and dvd flick throws up an error log and ceases?