[aeniug2]

We too were having a bit of trouble with our solenoids, but nothing like what you describe...

I would suggest:
-- Check to see if the green indicator light on the cRIO module comes on when the solenoid is supposed to be activated.

-- Check to make sure the solenoid is plugged in correctly to the aforementioned module, specifically to the port that the code is trying to use.

I can get pictures of our setup during tomorrow's meeting if you haven't solved the problem by then.