help with throttle cerasim 222

I seem to have an issue with the throttles.  I use FSUIPC with my saitek proflight throttle axises.  My normal throttle axis is set to throttle and then my prop pitch is set to another axis.  I have no problems starting the engines.  I have the throttle set at 100% and I start my lift.  If I lower my throttle at all the helicopter falls out of the sky.  Can anybody help me?  I have to lower the throttle to land, it can't be full the whole time.  Thank you.