i'm just hoping that your problem has a simple fix...to see if you have a simple tail rotor rigging problem (as druss described) just feed in a lot of right rudder as you increase throttle and attempt to get light on the skids...if the right rudder stops the spinning, your problem is probably mechanical instead of electronic (which scares the heck out of most beginner eheli pilots.)...btw, if you're trying to lift off on a slick surface, with after-market heavy plastic or carbon blades, the spinning problem will be worse...just trying to help...ken