Route Sample Clock Through External PFI

Hello all,

I am trying to configure my PXI-6733 AO board to route an AO task sample clock to the PFI channel. I am doing this in Visual c#.

I want to be able to use this signal external to the PXI chassis. I have this so far (AOTask is an instance of the c# class representing an analog output task):

AOTask.ExportSignals.ExportHardwareSignal(ExportSignal.SampleClock, "PXI1Slot4/PFI5");

I have tried putting this before and after the AOTask.Timing.ConfigureSampleClock(....)

I verify the task and everything appears as it should, and I get no errors when trying to debug. So everything would have appeared to work, except nothing appears externally on PFI5, which is the PFI channel with a direct route to the AOSampleClock.

Do I have to specifiy somewhere else that PFI5 should be configured as an output - it just sits there at 5V for the duration of the output task.

This is driving me crazy, thanks in advance for any help.

Kyle