backtrack arm on s4 please help

I tried to boot backtrack on samsung galaxy s4 i9500 5.0.1
rooted and I installed BusyBox 1.24.1


but I got
on terminal emulator
==================
u0_a353@ja3g:/ $ su
root@ja3g:/ # cd sdcard
root@ja3g:/sdcard # cd bt5
tmp-mksh: cd: /sdcard/bt5: No such file or directory
2|root@ja3g:/sdcard #
==================
and I tried
==================
u0_a353@ja3g:/ $ su
root@ja3g:/ # cd storage/emulated/0/bt5
root@ja3g:/storage/emulated/0/bt5 # sh bt
mkdir failed for /data/local/mnt, File exists
losetup: /sdcard/bt5/bt5.img: No such file or directory
mount: Device or resource busy
mount: No such file or directory
mount: No such file or directory
mount: No such file or directory
net.ipv4.ip_forward = 1
bt[23]: can't create /data/local/mnt/etc/resolv.conf: No such file or directory
bt[24]: can't create /data/local/mnt/etc/resolv.conf: No such file or directory
bt[25]: can't create /data/local/mnt/etc/hosts: No such file or directory
Ubuntu is configured with SSH and VNC servers that can be accessed from the IP:
eth0: No such device

chroot: can't execute '/bin/bash': No such file or directoryShutting down BackTrack ARM
failed: No such file or directory
failed: No such file or directory
failed: No such file or directory
failed: Invalid argument
losetup: /dev/loop7: Device or resource busy
1|root@ja3g:/storage/emulated/0/bt5 #
==================
please help me

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