Pioneer dvd 111d

ive got a pioneer dvd r/w dl 111d burner and i had the orignal firmware on it now since ive changed firmware i cant burn cd’s or dvd’s in the nero it says communication error and i wanna know y this is saying that and y i cant burn files again my firmware was 1.09 now its 1.29 and is there anyway to change it back to the orignal firmware ty

You have flahed your drive with which firmware exactly?