[mikets]

It could be a number of problems but since you did not provide enough info, it's hard to tell. For example, is that an electrical problem that you connected the solenoid incorrectly? Your code did not show how you initialize/instantiate your double solenoid. Make sure your solenoid is connected to the correct channels of the solenoid module in slot3 (or slot 7) of your cRIO. Make sure your solenoid module is powered by either 12V or 24V (depending on your solenoid's power requirement). When your code set the solenoid forward or reverse, did you see the corresponding LED light on the solenoid module lit up?