Kali Linus Error: Permission Denied

Im on root, running Kali 2.0 on Debian-64, Every time I try to test out an insatgram Brute forcer (.py script) I get the error: Permission Denied

root@kali:~# cd Desktop

root@kali:~/Desktop# ls

armitage DVWA-1.0.8 fb-bruter.pl password.txt

ddos-script-master facebook.py instaBrute-master

root@kali:~/Desktop# cd instaBrute-master

root@kali:~/Desktop/instaBrute-master# ls

dictionary.txt instaBrute.py LICENSE mainLib.py README.md usernames.txt

root@kali:~/Desktop/instaBrute-master# ./instaBrute.py

bash: ./instaBrute.py: Permission denied

root@kali:~/Desktop/instaBrute-master#

Im pretty sure im not doing naything wrong and that im on root. Help would be greatly appreciated :D