Basic “Hello Drone” Help

Hello, very new to working with the pixhawk but I have an iris+ with a pixhawk 2 and I am trying to run the "basic “hello Drone” program. I am following the article in the link below but am getting some weird errors which are under the link.Anyone know whats wrong?

Starting copter simulator (SITL)
SITL already Downloaded and Extracted.
Ready to boot.
Traceback (most recent call last):
File “”, line 3, in
sitl = dronekit_sitl.start_default()
File “/usr/local/lib/python2.7/dist-packages/dronekit_sitl/”, line 341, in start_default
sitl.launch(sitl_args, await_ready=True, restart=True)
File “/usr/local/lib/python2.7/dist-packages/dronekit_sitl/”, line 271, in launch
p = Popen([self.path] + args, cwd=wd, shell=sys.platform == ‘win32’, stdout=PIPE, stderr=PIPE)
File “/usr/lib/python2.7/”, line 710, in init
errread, errwrite)
File “/usr/lib/python2.7/”, line 1335, in _execute_child
raise child_exception
OSError: [Errno 8] Exec format error