Balloon Drop Issues

I’m trying to drop my wing from a balloon, and doing initial testing with a quadcopter.
Goal is to:
-detect drop (2 m/sec descent)
-turn on relay0 that heats up nichrome wire
-wait 3 seconds
-turn off relay0
-fly back to launch point

Currently, none of this triggers: I arm wing, place in auto mode, descend with quadcopter at 3m/sec, and nothing happens. Am I doing something obvious wrong?
Parameters and plan:
latest.param (18.8 KB)