DL3 Versions Issues

OK.. this is a little wierd. I've got 11 DL3's on a show, from two different vendors. I've got 3 that will not play PNG's in transparency. In fact it adds all kinds of extra lines and boxes into the image? Is this because the software version in the Axon is older than the others? If so.. HOW DO I FIX IT?!?!

I've worked around by recreating the graphics as jPegs and using the chroma but it's looks bad.

Any thoughts?

Warren