[Import] Vertical Gate Imported model Open animation doesn't work

[Saifron]

So I imported a vertical gate model but its open animation doesn't work. I tried using WC3 Viewer to look up the animation. It is called "Stand Alternate" and I tried using that but the animation that gets used instead is the "None" animation which is just wooden planks on the ground near the gate. I also tried death, open, alternate, and stand for the animation name and the gate still won't open.

Does anyone know how I can simply use the open animation for this gate? The built in editor gates work just fine, but this one is being difficult.

Thank you.