AD-7243S and DVD-R DL

Hello i have the AD-7243S v1.03 and i am having trouble with DVD-R DL media, when trying to write JVC printable media 8x (TYG11) i result on bad burned media and write errors , the programs i used are : Nero 10 , alcohool 120% and blindwrite and with with write speed 4x , 6x ,8x always resulting on error .
It seem that the write errors occur when trying to set layer brake and start to write on L1 … can someone help ?
I only got to write the TYG11 DVD-R DL media with an external Samsung USB SE-S084B on 6x speed but the AD-7243S drive does not read them correctly.
Any ideas? Thank you George.