not talking with 2.0 wireless keys

We link a cortex and joystick with a USB tether but they don’t talk with VEXnet 2.0 keys. The VEXnet and Game lights double blink on both cortex and joystick

Could it be your VexNet keys have not had their firmware updated? Or that the keys have been updated but the Cortex has not? There has been a change in all of that recently. I personally haven’t gone through the process with our own keys, but I know people have been caught by this problem of mismatched firmwares.

https://vexforum.com/t/vexnet-2-0-oct-2014-firmware-readme/27409/1

Thanks, we are all set.