Sony Dw-d23a

Hello

I hope I am posting in the right place.
I have a SONY DVD WRITER (DW-D23A) and noticed that I am unable to change the book type to DVD ROM when using DVD +R DL.
I have tried changing the book type in Image Writer (using the LITE ON settings) and even though I get a succesful confirmation that the book type has been changed to DVD ROM I still notice in the main Window that it is set to DVD +R DL.
I also tried doing it with NERO and have the same issues.
I then tried to update the firmware CSY1 using a firmware for LITE ON 1563S. Even though I was succesful in updating it it made no difference when it came to changing the book type.
Can anyone help please?