Maby you put the anti-reverse lach in backwards or the wrong way?
Or maby your motor isnt strong enough to pull that spring back..
im not an expert in the field but i cant imagine a CA motor not being able to turn a 110 spring over... i think my next step would be hookin up a multimeter and checking Resistance to the motor and after the motor... maybe even the resistance of the motor its self
i hope this helps if not don't hesitate to let me know ( i get my electrical know how from being a motorcycle mechanic haha)