Along the same lines as HighTech, have you tested that you can control an LED with that line manually? Next see if you can control the relay manually. I am assuming you have, but want to be thorough.
Also, if you don’t mind me asking, what are you building? MyDevices has a competition on right now that gets you money if you submit your projects.
Check it out: Submit Your Cayenne Projects! [contest ended] - #3 by bestes
Cheers,
Craig