Only 2 motor that move when im in q stabilize mode

hello guys, I’m currently building my tri copter vectored and I’m using 2 front motors that tilt and 1 rear motor that are not tilt. when I try to throttle my plane in stabilize flight mode, only 2 front motor that start throttling, and the rear motor are not throttling. my assumption there is something wrong with my parameter, and I can’t find any help on the internet. can you guys help me please?
lalala.param (24.8 KB)
this is my parameter on the mission planner

I already upload this on vtol plane category btw.
thank you guys