Can't roll or pitch in FBWA-B mode

hello, I can’t roll or pitch my flying wing in fbwa or b mode. ailerons are just moving 2mm in roll and not move in pitch so can’t roll and pitch as i want in fly.
i have set the lim_roll_cd at 4500.
i can easily move at 45° in manual and stabilize but not in all other mode.
does anyone know why please?