I got this together with the cowboy studio wireless transmitter and trigger last week. The combo worked the 1st day I tried on my nex5r.
Today tried again , cant make it work.
Tried with the flash directly on the MSA-10 also.. still doesn't fire.. wonder what's the problem.
Probably need to meet up with someone who has another msa-10 and try on my camera.. see if its the camera problem or the msa-10..