Help, please. Mover not 'moving on dark'

[DRP]

Our show (opening in 2 days) is now lit, but in the process (including inserts and copying), for some cues the movers do not move on dark.  ('Move on dark' is set on the board, a FLXs 48).  I assume that in the editing process, somehow the move on dark or track forwards functions have been corrupted in one or more cues.

Simplistically, if I had 3 cues:

1. mover (working)

2. dark

3. mover (moves to position when cue activated)

In which cue is the fault likely to be?  Do I need to delete the cue and re-enter, or is there another fix?

Many thanks.