I hope someone can help me with my SQ-i motor drive for the SQ-Ai.

My problem is that the drive stops mid wind, i.e The shutter gets released, then winds for a short moment. then the red light flashes up. I have to press the drive button to rechoke the shutter.
I thought that maybe the batteries are low, so i replaced them with some freshly charged eneloops, but still the same behavior. Do I just need to put in real alkalines? Can someone provide some experience with this problem?

thanks

p.s. if someone has a copy of the manual, could you check if it contains a troubleshooting guide or something similar please? I've been looking for hours, but i can't seem to find the motor drive manual online.