1673S & booktype135 - won't change?

New to the world of DL drives & burning. Have had good luck with Liteon in the past.

Now know I need to set the booktype on the drive to DVD-ROM for the DL disc to be read in most set-top players. Downloaded Booktype135 from liteon to do this.

Open the utility, "change booktype to: " select DVD-ROM, click on change, message at bottom of window “Booktype changed successfully” but current disc booktype never changes, also nero6 still showing booktype on media as DVD+R DL, not DVD-ROM. What am I doing wrong?

drive has new firmware JS05.


Check the booktype after you have burnt the disc