you must do some mistake but i don't know where. Tese are really only changes needed. I tested it on RTW:BI but it shouldn't do any difference.
try to be very carefull with those "arrow generators" these coordinates are somehow very important. it was runnig very good untill I pasted those generators into "scorpion desciption" then had some errors . after few corrections finally it works .
I can't help You in other way cause I am not that much good at scripting all I achieved was made but "tryies and mistakes" metod.

good luck