I have a new Esky HoneyBee Helicopter

I followed the directions; put the helicopter on a smooth gym floor; turned on the transmitter; then plugged in the battery. The LED blinked red three times, then green four times, then stayed solid green. I slowly pushed the throttle stick forward but not to take off. The thrust of the tail rotor blades did not counter the torque of the main rotor blades. The helicopter just spun on the floor until the antenna was wound around its base. The trimmer on the transmitter does not increase the tail rotor enough to counter the main rotor.

Page 5 of the manual says:
"Watch and observe if the tail rotor blades rotate in proper proportion to the main rotor blades. That is, to observe if the thrust of the tail rotor blades can counter the torque of the main rotor blades. If not, dis-connect the batttery and adjust the Proportion Trimmer (2) [which page 4 shows is the Proportion screw on the Control Box] to increase (+) or decrease (-) the r.p.m. of the tail rotor blades."

My vendor has told me NOT to touch the proportion screw because it was set at the factory, but unless I do, the tail rotor will never be able to counter the torque of the main rotor. I have a few choices: adjust the screw as the manual says; send it back because the control box is bad; or accept that my vendor just says I am inexperienced and will learn over time. I cannot learn when the tail rotor cannot counter the torque at all.

Should I try adjusting the screw or is it a bad control box?