As SEEME said it would probably be your best bet to ask some flyers at a local club for help. There can often be a world of difference between a simulator and actual flying. Someone in person can better explain the process of learning to fly RC.

Maybe if you explained in a little more detail what the plane is doing when you fly it. Does it turn and dive immediately, or does it zoom upward out of control, or what? This site is a great source of information!