I have a machine running RHEL 6 with the kernel driver and a PCIe-6321 connected to a BNC-2120. I'm trying to run the example programs as a sanity check that everything is fine before going forward. When I run dioex1, it claims to write then read 0x5A on port 0. However, the LEDs (labeled P0.0 through P0.7) do not turn on as expected. When I run aiex1, it appears that I'm just getting background noise. Am I missing something?