Difficulty using analog output to generate a predetermined file

Hey all, 

I attempting to output a predetermined file to an analog output channel at 1kHz on my USB 6343 Multifunction DAQ. 

Here are the issues I'm experiencing:

1: The file outputs so quickly my o'scope can't even pick it up. 

2: When you try to stop the output it nearly freezes up.

3: My waveform graph and plot data do not update with the data that has been read. 

If anyone wants to tackle one ore more of these issues I would be very appreciatve.

Thanks,

Kassandra