i have my computer outputing a simple crossfade while i finish everything up, it runs all the time, with the express being powered off durning the day, when it is powered up, it does not output to the lights. I have to unplug the express then unplug the dmx, power up the LE and wait for it to boot, then plug in the "DMX and it works fine. Is this correct- the LE needs to boot before it gets DMX?