If you hook just one up, does it work? You probably don't have enough power to throw two at one time. What are you using for a pwoer supply? For solenoid switch machines you get the best results using a capacitor discharge power supply, they're easy to make or you can buy one from Circuitron ("The Snapper"). A CD power supply gives you the strong but short jolt of power you need to effectively operate solenoid switch machines. Plus they limit continuous current to a low level so that if you hold down the button too long or it gets stuck, you don't burn out the switch machine.

                                     --Randy