[Bongle]

In WindRiver check out the target console (or turn on serial debugging and use a terminal app with a cable). It sounds like you may be having a linker error, in which case your program will be unloaded. For best results, start the target console the second that WindRiver connects to the robot in the device view. It's also possible your code is crashing the cRio and causing it to lose comms and unload your program. Try to see if the simple template code works.

We've also had your symptoms occur with a very low battery - the code gets loaded, a motor turns, and the voltage drops so low the cRio resets.