Moss stitch on 2 needles when attached to GC

Needles 52-60 knit in moss stitch when knitting from right to left. The sponge bar and all needles, including the garter carriage needle, have been checked. The garter carriage has also been tried out on two other similar Brother machines. Do I need a new circuit board, because it will knit some patterns from the manual. Has anyone else has this trouble? I’d welcome any help please.