I have recently had my 4 wheel drive Reich motor mover transferred onto my new twin axle caravan by my dealer. It worked very well for the first week, however I am now in Spain and it is now only working intermittently when I press the controls on the handset. I have replaced the batteries in the handset and the leisure battery is brand new and fully charged. Obviously on small pitches in Spain I need the mover to work correctly and is giving me a serious problem. Does anybody have any idea what the problem could be please?