ASV RC30 will not go forward

Hi everyone. I am new to this and looking for help. I have a ASV RC30 that will not move forward. All other functions operate normal. It will go in reverse, but not forward. Nut even a hum or anything when I push the stick forward. Was running fine and then all of a sudden stopped dead in it's tracks. Had to go back to the trailer in reverse. Any help would be greatly appreciated.

Thanks Mike