I am trying to put together a model rocket launcher for my son and am having issues with wiring. He wanted it to look "cool" so I have two SPST switches that light when powered, and a single SPST push switch. All are in series, and powered by two 9v batteries in series. One switch powers, then the next arms, and finally the push button is supposed to fire. What happens in reality is when the circuit is closed by the push button the lighted switches turn off and power is lost. I've included a diagram. Do I need resistors after grounds on the switches to limit power flow? I've looked at several designs online and mine seems to be the same.