Try Full Parameter List/Tree and check RC4 limits
Unfortunately, this parameter does not fit.
basically you need to tell the FC the radio range (RC...) and the setup of your helicopter (H....).
'Radio Calibration' sets the RC4 values similar to these:
The helicopter specific values start with H(or H_) depending which version you use. In 3.3 you get/set something like:
You can change all parameters in 'Full Param List/Tree'.
Thanks for the help!