having to setup radio every time i shut truck off

[VenomousSVT]

i have the 21t 1/10th crawler system and it has started making me re setup my radio every time i shut the switch off.. when i turn the truck on i have to hold down the setup button and go through the pulling the trigger and brake to full so that it can set up the parameters of the transmitter. it didnt do this at first but all of a sudden started doing it every time i shut off the truck..

any advice is greatly appreciated.