CRIO and Jaguars not communicating

Hey, I have a big problem. It seems as though no matter what we do, we cannot get our CRIO to talk to the Jaguars. Whenever we try to run code incorporating the Jaguars, even just the Jaguar constructor, we get a timeout error. We have tried both CAN and PWM, and we have made sure that all of our software and firmware is fully updated on all of our applications and devices. If anyone has any kind of suggestions, or if you have run into a similar problem before, please let me know. Thank you.