What did i do wrong when making my first ever nav software update cd

tried v17.1 to begin with (will do key cd and v27 if successful i thought)

i loaded ImgBurn and selected BMW NaviSoft 17_1.img as source image
set mode to write
set write speed to 1x
put in known new cdr
checked sectors reported 16,127 mode 2/form1

but got failed cdr and noticed in the TOC is reported Track 01 (mode2 form 2)