It looks like you are using a PC power supply and do not have the 24 pin connector connected. You also have the 5 volt regulator installed but not the 3.3 volt regulator. This means that the board will not be getting 3.3v which is required to run the PIC chip. This is why you are not getting DMX out since the PIC controls the DMX out and it is not getting power.
If you are using a PC power supply you need to make sure the 24 pin connector is connected. It will supply both 5 volts and 3.3 volts to the board. So, you do not want either of the optional regulators installed.
If you are using a straight 12 volt DC power supply, you need both the 5 volt and 3.3 volt regulators installed.
Also as tbone pointed out, the Pixelnet Universe jumpers should both be set to the same value.