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?

http://python.dronekit.io/guide/quick_start.html

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