If the Lionel controller doesn't work, my guess is a different toggle won't either. Here's a diagram of what's in the switch.
One comment, try removing one of the yellow wires, they're outputting +/- 5VDC, maybe that's where you're going wrong, that would be clashing in the switches. I've wired two of these together in the past, and they worked fine. I didn't wire both yellows to the switch, but the red/green/black are all paralleled. You can also swap one switch green and red if you want one to be thru and the outer to be out for each path.
