It sounds like you are trying to get started with NI-DAQmx and want to
output separate signals on the two analog output lines. The
restriction of the hardware is that all of the analog input or output
channels must be contained with in the same DAQmx Task. There are
a couple ways to do this.
If you want to stick with the DAQ Assistant, I searched our KnowledgeBases and found the following example program which does analog output for two channels using the DAQ Assistant.
If you would like to drill down a little farther and use the lower
level DAQmx VI's, I would recommend looking at one of the shipping
examples, the format for multiple channels is Devx/AOy:z where x is the
device number, y is the starting AO channel, and z is the final AO