[Mark McLeod]

Do you have another robot radio to verify with?
It can actually be just about any AP you might have lying around, and doesn't need to be setup with the radio kiosk.
It also doesn't need to be mounted on the robot, just use a wall power supply for it and connect the Ethernet to the roboRIO.

Double check that the radio is connected to 12v power from the VRM(if it's the 2016 Open Mesh radio). Lower power will affect wireless operation first.
Check to see that you have a fresh robot battery, too.

You can also check the status lights on the radio. It should have a green wireless light, a power light and at least one Ethernet light on.
Then check the roboRIO Ethernet port to see if it shows both solid green (hardware) and blinking yellow(communications) lights on.