Make sure you have dc_servers=1 in your config.ini... I think that's the command. I had the same issue when using my car computer...

BTW, Tony's Empegface is a much better thing for using as a display in car. I have a 7" touchscreen (with broken touchscreen) and I resized one of his examples using the instructions and have it fit width wise across my screen and it's in direct sight when driving as opposed to looking down. The only drawback is the immense CPU usage of Empegface... I'm running a VIA 1GHz motherboard with 256MB ram in a super small case (DIN size... 10" deep and has DVD player) and it sometimes overwhelms the PC.