Help for position hold settings

Hi again
I use the mhkabir firmware to address for pixhawk
In LPE mode, I have a pix4flow sensor and i do not use GPS.
I uploaded the pix4flow orginal firmware ، but unfortunately, when I go to a mode position hold ,
my Quadcopter becomes unstable and shaky and how many times my quadcopter crashed
Should I do certain settings for this mode?
Thanks if you help me
Pixhawk v2.4