1. Check heater protection reset switch:
it is located under the control panel, undo the 3-4 screws holding it on, and carefully move it back, the reset switch is right below the opening. Press it lightly. If you hear a light click, it was reset, if not, it might not have been tripped in the first place.
2. Make sure the drum you are attaching does NOT have the orange washer on the cog lid. This will cause the slowing and stopping of the motor.
3.Make sure your machine is hooked up to a water outlet, and pressurize the hose by opening the water source tap. The solenoid will keep it pressurized until needed by the machine.
Try those three things and let us know what you find.