Kevin,
In my previous post I didn't notice you were using the VXI-AO-48XDC - 48, and VXI-MIO-64XE-10. These boards require the NI-DAQ driver in Windows, and unfortunately are not supported in Linux. Since they are obsolete there is no plan to develop a driver for Linux, so you might want to stick with Windows if you plan on using these boards.
Shawn B.
National Instruments