try another burner, i had one internal burner that was a coaster printer, used an external one and it works everytime. IMGburn never worked for me either
try setting the record mode to "TAO" on 120% Alcohol and the write speed to x16
what are you trying to burn? sometimes like with the old echelon CDIs from the early 2000s they have a hard time booting
last ditch effort could be extracting the CDI and using the "CDRecord" option in bootdreams, or try the "IMGRecord" option which AFAIK doesn't require extracting but i've never used it before.
a proper burn with CDRecord i've found to perform a lot better in terms of time it takes to boot the game, seems like the laser has an easier time. but making your own CDs is kind of advanced with making sure the LBA value is correct for what CDRecord expects, but generally newer CDIs have this taken care of
eventually you'll get it working