Help with custom map

[:1]I'm making a map based on Osgiliath from LotR and I have almost all of the units/terrain done. Just need to make a bridge that fits across the river and a few more wrecked buildings. I need help with the triggers and AI because right now i get trigger errors whenever i try to test it.

Please help!|||I think you need to be a little more specific on what is wrong and what you need help with.