In chroot environment, screen works only for root

First the system has the following system mounting points
/proc, /sys, /dev, /dev/shm, /dev/pts, mounted properly.
However, in some OS, the file
/usr/libexec/pt_chown has the permission -rws–x–x
This seems not working in the chroot subsystem.
By changing the permission of the file /$chroot_root/usr/libexec/pt_chown to
-rwsr-xr-x
screen works in chroot system.