Bristol, your count system on your striking train is not working properly. I would guess that it is a "rack and snail" system. The rack is not dropping properly and the strike is locking after one count. You need to find out why the rack is not dropping. If it is a "count wheel" system, then the train is locking as the arm rides on top of the wheel. You need to adjust the arm so that it only locks when it drops into the slots.
Stevens Clocks
September 2009