How to use create an MMJOY button as part of my circuit?

User squeezes a trigger which powers a circuit - this pushes a solenoid actuator.
When squeezing the trigger and activating the circuit, this is also registered on the computer in MMJOY as a button press. This is then imported into a game.

I cannot get the circuit to recognise the button press at the same time as the trigger squeeze without always being 'on'. I have no resistors or diodes in my circuit if that helps.

Any ideas?