hrm... I remember reading this once, but I can't remember what the issue was.... actually it mighta been low batteries in the Tx... You need atleast 1 or 2 green bars at the lowest.

Also... your Tx should be turned on and turned all the way down before you plug in your heli on both the throttle and the throttle trim. Also it sounds like you've already done it, but you need to not be in idle up (switch towards the back of the Tx).

Make sure you don't move your chopper (normally until you get a solid green), because this is when your gyro is setting itself for 0 motion.

The other things I would try is taking out the crystals out of both the Tx and the Rx and then put them back in making sure they go in all the way (or in other words, just reseat the crystals)

there are some other possibilities if you have never got this chopper off the ground before, like something in the receiver the tx or the 3 in 1 could be damaged, or even one or both of the crystals. Have you been able to fly this before?

If you have been able to fly... what were the circumstances the last time it worked? Like did you crash or leave it in a hot car or something for example?