u could ask them what they think the prob might be and if no solution then they should send u a new one - if they have a warranty of any sort. u will have to send ur old one back i would have thought tho.

do u or any mates have any radio gear u could try in the same spot - or do u have problems anywhere that u take ur car? try a different crystal maybe? i have been lucky with radio probs, so thats all i can suggest.....other than throwin it all in the bin and buying a decent aftermarket one, with uprated servos - better steering and throttle reaponse from higher torque/higher speed servos. good if u got the cash