It shouldn't matter, but since it's a helicopter, you must use a helicopter model to fly the helicopter.
As stated, I had no issues with it. Which is why I suggest just copying your settings to a new model and trying it there, then if that doesn't work, just creating a brand new model and completely going over everything again. It's a pain, I know, but it works sometimes.
Hell, try this first. Just click both the back and clear buttons at the same time (while the Tx is on) and create a new model. Heli or plane doesnt' matter. Then without changing anything, go into the calibration menu and see if it works there.
Let me know.