I received as a gift a few years ago a SW40VE (used) with the NRA logo on the slide, apparently the gun of the year at one time. Well I go to the range and attempt to discharge a round, yes I loaded the gun and racked it but when trigger is pulled, nothing, I pull slide bacc about half inch, hear a click and I fire the gun, slide ejects spent round and loads chamber but fire arm will not discharge, pull slide back half inch and trigger resets. What is my problem? I would appreciate any help or should I just return to S&W? Thanks in advance.