problem installing nao_robot ros stacks

edit

installing ros on a remote pc to control nao,then i use wstool & catkin installed the humanoid_msgs & nao_robot,this is my step:

1,$ cd ~/catkin_ws/src
2,$ wstool init
3,$ wstool set humanoid_msgs --git git://github.com/ahornung/humanoid_msgs.git
4,$ wstool update (it's successful)
5,$ source /opt/ros/hydro/setup.bash
6,$ cd ~/catkin_ws
7,$ catkin_make  (it's successful)
8,$ source ~/catkin_ws/devel/setup.bash

there is no error.

i add path in my .bashrc:

export ROS_PACKAGE_PATH=~/ros_workspace/src:$ROS_PACKAGE_PATH
export PYTHONPATH=/home/cit/naoqi/naoqi-sdk-1.12.5-linux32/lib:$PYTHONPATH
export LD_LIBRARY_PATH=/home/cit/naoqi/naoqi-sdk-1.12.5-linux32/lib:$LD_LIBRARY$
source /opt/ros/hydro/setup.bash

then i follow the tutoral :

cit@cit-ThinkStation-S20:~/catkin_ws/src/ros_robot/nao_bringup$ roslaunch nao_bringup nao_sim.launch
[nao_sim.launch] is neither a launch file in package [nao_bringup] nor is [nao_bringup] a launch file name

maybe i miss something or do something wrong,i don't know,do you know?