The main problem you have here is not plugging the right cable in to the receiver slots, if you bought a radio other than the futaba 4wd, i.e. other brands, their channels might be different. On plugging the channels differently than that speciflied inteh instruction manual an dthen trying to set up as per instruction manual will not work. You have to compare the channel 1 to 4 on your transmitter instruction manual with the tamiya one and try to match them, then set up the sticks as per the instruction manul of the tank.