Driverstation Looses Communications after 6 minutes

[rc4rest]

We are using LABVIEW and if we run our robot for just over 6 minutes of run time, the robot stops working. If we run for 3 minute intervals by disabling the robot, and then re-enable it we can run forever. All indicators say that we have communications from the driver station to the robot, but nothing works. We have to reboot the robot and the PC to get everything back. We have used multiple computers for the drivers station, different routers, with the same results. Is there something wrong with our code?