Hi B_real... welcome to the asylum.
Are you knowledgeable about electrical basics? Do you understand continuity, resistance... what an open, short and ground are? If yes, then it sounds like you have a short to ground. If no... here's what's happening.
When you hit the button, instead of completing the circuit
through the atty coil, the positive terminal is shorting to the mech body, or the negative side, AKA ground.
Like if you put a cable from the positive to the negative on your car battery... on a smaller scale, but just as dangerous.
As ImThatGuy is alluding to, chances are it's shorting to ground
through the atty. You need to closely inspect your chimbus positive terminal insulation... it may be faulty. Do you have another atty? That work for you? If so... that's your sign, the chimbus positive terminal is shorted to ground.
Good luck,
SOF