Hi, i just receive my second heli,but i have a problem with it. My rotofly just want to go to the left. when i give some juice to lift off the heli go straight to the left. i put some trim correction but no effect. i pull thes tick to the left no effect. The swashplate seem to be o.k. What can it be ??? i re-done all the ajustement no effect. what can i do ?