Sync Midi the the road hog

Hey there anyone,
I am currently on a theatre production in china.
the lighting guys here are using the road hog flying pig unit.
i am on a apple imac computer running protools. am trying to give them a midi signal. on my side, the signal seems to be going through but they can receive it?? any one knows what the issue may be?
will i need to install the drivers for the road hog on the mac? is it compatible?
need some help urgent here..

your time and help is much appreciated :)

thank you
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