dvd dual layer

hi,
got errors burning sony dual layer dvd's , i'm using sony writer and image burn , burning at 4x using 8x dual layer discs. i've saved the error message but don't know how to upload it here..

 

Open the ImgBurn log in Notepad;copy the text and paste it here.
It's generally accepted that the only DL disks that can be relied on are Verbatim DVD+R DL.

http://forum.imgburn.com/index.php?showtopic=4643