Yes sir, I've tried practically every combination I could find. Donner connected directly to the box, 2-foot cable, 25-foot cable. In the current configuration, I eliminated the Donner altogether and hardwire-connected to the fixtures. This past weekend, the box was on my T-bar. I then brought it down to my table (using a longer DMX cable) and neither the ipad nor my direct USB (for changing the channel) could find the box. As for when it was purchased, I can't find it in my email logs but I believe this was one of the earlier boxes. I tried adopting this product fairly early. It kinda (would come disconnected all during the gigs) work but it's always been extremely buggy. If you could expedite a replacement, that would be wonderful. I really like the concept and the UI on the tablet(s).