Spring RTS Engine

I copied the NTAI subfolder (and its contents) into xta_se_v066.sdz, but the AI still won't build anything. That is to say, xta_se_v066.sdz contains a folder named NTAI (along with all it's other folders) and inside that are all the files. I start a game on any map w/ NTAI XE set as the AI, either c...