SubRosa was a genius when it came to modding, so I doubt there is an error in the instructions. Thus I must ensure that thou has made no mistake.
The trait was added to all three files, in the proper format?
The trait had an acceptable result (one from the list)?
The trait had both trait data and trigger data?
The formatting is correct- no excess or missing punctuation, misspelled words, etc?
I have to ask, sorry.
You posted this in BI, but since BI is a subfolder inside RTW. it should work. I have no clue how to test this except playing.