i just got my microcontroller and joystick today and i cant seem to tether it. i followed the guide but it didnt work for me. On the cortex the robot amd game led lights blink very fast and theres no light on the vexnet. on the joystick, the joystick is a solid yellow and the Vexnet is a blinking yellow. plz help

What steps exactly are giving you problems? For instance, what happens when you wire the VEXNet Joystick to the Cortex directly (with a battery plugged into the Cortex) through the USB A-to-A cable and turn the Cortex on? Any specific information you are able to provide us with will help us analyze the problem better.

i am having the same problem but i do have the cortex and the joystick connected with the a-to-a usb cable and the game light on cortex is flashing the VEXnet is off and the robot light is on. with the controller the robot and VEXnet light is on while the game light is off

Zinker; according to the VEXnet Cortex User Guide provided by VEX, rapidly flashing green Game and Robot LED's mean the robot is in autonomous mode; it is probably running the code already on the Cortex. The yellow Joystick and VEXNet lights on the Joystick itself means two things; the joystick light means it has low battery (generally between 5.5v and 6.5v) and that the Joystick is searching for a mate. Charging the batteries on both the Cortex and VEXNet Joystick and then using the USB A-to-A cable to connect the Cortex directly to the VEXNet Joystick may solve the issue.

PLTW_Osseo; I would check the battery levels as well, and take a look through our setup guide, here.

If either of you continue to have issues mating the Cortex to a VEXNet Joystick, you may want to contact VEX tech support as there could be a deeper issue with either component: http://www.vexrobotics.com/contact/contact