Z-Stuff DZ-2500 on MTH AIU

[First Timer]

Hi guys, I recently purchased 2 Ross custom switches with DZ-2500 switch machines.   What I wanted was to wire it using my MTH AIU and I followed the instructions step by step on the provided instruction sheet. Blue goes to 1, white goes to 2, black goes to common of transformer and then in the AIU and from the AIU to the common of the rail.

Everytime i press the turn button (S5) the machine activates and throws the switch from straight to turn and vice versa. When I press the straight button (S4) I only hear a click but the machine does not throw the switch back to straight????? Am i doing something wrong????

[phillyreading]

From what I read you have no positive wire going any place. So it makes me wonder how you even get anything to work. I have the DZ-1000 switch machines and they need a positive and a negative to work with. You supply either the positive or negative to the switch control and the other wire to the switch, the two wires from the switch control the path of the switched wire(whether negative or positive) that turns the switch left or right. The AIU acts like a switch controller and you do not wire in a separate switch control when using the AUI as that is your switch control device.

[First Timer]

O ,  sorry, I forgot to mention red goes to the + side of the transformer