As it is not yet halloween and I am asuming there are no barrels or tubs on your flying site with apples floating in them, it cannot be bobbing for them. SO.....

I would greatly suspect that your throttle / pitch curves are set for too low an RPM.

I am also assuming that your heli is hovering at the stick position that you want it to hover at. (For most beginners that is at half stick but for some that are into 3D that can be anywhere from half to 3/4 syick) )go to the mid point on the pitch curve and bump it down two points and to the throttle curve and bump it up two points. You will notice that now the head speed has increased. Continue to adjust as described until the bobbing stops.