You put what you want to happen in the .sqs.
It's all well and good adding an action but the action has to do something.
Your ramp probably has an animation so in the .sqs would be something like,
unit animate ["Ramp", 0]
Or something like that. You'll have to dePBO the addon to find the particulars, unless it's in the readme but that's being optimistic.
Also, in your.sqs will be the commands to remove the action and replace it with, I presume, "Close Ramp".