we've set up our controllers, but found that Vixen 3.2 won't talk to the USB dongle. The configuration is as follows: Windows 7 laptop connected to AVD USB dongle. Then cat 5 cable to AVD DC48 then cat 5 to Mega60 controller. The controllers are set up as DMX Open in Vixen. The tx and rx lights on the dongle aren't lighting up at all. However, when we open xLights, the tx and rx lights immediatley start flickering. We have one string connected to channels 49 & 50 (ports 1 & 2 on the Mega60). In xLights, the string lights up in test mode. So we know that all the connections are good. It's just Vixen. Any thoughts?