Granting special abilities through .bcs

Hey, I'm trying to write a script for a custom NPC that will add an innate ability when particular quests are completed, but can't make it work. There are no reported errors when I compile the .bcs file, so I must be formatting the file correctly, perhaps though I am using the wrong .ids triggers/actions or something similar. I have attached an example for when the party saves Nalia's keep, I can post any other necessary files.