My script hotkeyset doesn't respond

Hey so , hotkey that i have set here doesn't respond when i press the key i set it to which is X in this case , anyone know why?

HotKeySet("x","bf")
  func bf()
	sleep(300)
Send("{1}")
	Send("{SPACE}")
	sleep(220)
Send("{w}")
	sleep(50)
Send("{w}")
sleep(30)
	send("{LCTRL}")
	Sleep(200)
	Send("{LSHIFT}")
EndFunc
While 1
   WEnd

thanks
any feed back is needed