cRIO communiciton fell

[reuven]

Hello all CD community!
yesterday , just 1.5 hr's from stopping with the build we had a strange thing happening with our robot,
our team of programmers burned a code successfully on the Crio, and the code ran good for like 5 min's
after that we lost communication with the RIO,
the interesting part is, that this is not a router problem, iv'e manged to PING both the router itself and the camera but not the RIO.
after turning on and off the robot we had communication again, but the same problem occurred again,
i have to add that the same code ran successfully all day long before we burning the code (building and running as start-up).

can anyone think what the problem is? and more then that how can i solve it (i don't have this RIO with me cause it was shipped with the robot, but i do have a second RIO which i use for the time before the regional)

thanks in advance