Does anyone know how to lower stairs?

[Thorogrimm]

I'm using Ultimate Doom Builder right now and I can't seem to get some stairs to lower consecutively, it just seems to lower once and halt without further movement. Any idea how to get it to work properly?

(PS, I keep getting an error when I load up GZDoom to test it which says '(null): Invalid ACS Module'



[Gez]

You can look at the examples here. Note that line direction is what determines how stair effects propagate: if your stair builder stops early, that probably means you need to flip the lines between the steps.