I've briefly discussed with dmoore but haven't come to a conclusion yet, so I'll ask here. I have a set of these 3 channel controllers (20 of them), and I set their addresses starting at 50 thru 119. I've tested the first one (50, 51, 52) but LightShopPro (LSP) insists on working only when I send commands to 51, 52, 53. Shifted by one. I have verified and even reset the controller. I am using a D-Light RS485 dongle to send the DMX. LSP recognizes it without problem as an ENTEC (not pro). Things I have NOT tried (yet). I haven't tried the next few controllers. I haven't tried it with Vixen (because I don't have it installed). But I will and soon. Any ideas? Anyone had it happen before? Should I suspect the LSP plugin?