why doesnt this trigger work?

Quick Buildings
Events
Unit - A unit Begins construction
Conditions
Actions
Unit - Set (Triggering unit) construction progress to 100%

why doesnt this trigger work. Its for FTRP and even though it should work it doesnt. Basiclly it makes it so when you start building a building it will automitclly make it complete any one know what wrong with it?

I think with (triggering unit), you're telling it to finish construction of the Builder, not the building, which, of course, does absolutely nothing.

Use: Event Response - Constructing Unit instead

Don't you mean "Event Response - Constructed Structure"?

Edit: Oops, maybe I'm thinking of something else... it's late...

You need to you constructing Structure as your event insted of triggering unit