Cannot launch nao_driver

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[Go to Edit2 for the current error]

Hello, I am trying to launch nao_driver with the command:

NAO_IP=10.51.81.15 roslaunch nao_driver nao_driver.launch

or

NAO_IP=10.51.81.15 FORCE_PYTHON=true roslaunch nao_driver nao_driver.launch

but i get the following errors.

MyName@Wael:~$ NAO_IP=10.51.81.15 roslaunch nao_driver nao_driver.launch
... logging to /home/MyName/.ros/log/79d95dc2-8379-11e3-8cbe-90b11c6e6bd9/roslaunch-Wael-19571.log
Checking log directory for disk usage. This may take awhile.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

started roslaunch server Wael:38416/

SUMMARY
========

PARAMETERS
 * /rosdistro
 * /rosversion

NODES
  /
    nao_behaviors (nao_driver/nao_behaviors.py)
    nao_controller (nao_driver/nao_controller.py)
    nao_leds (nao_driver/nao_leds.py)
    nao_sensors (nao_driver/nao_sensors_cpp)
    nao_speech (nao_driver/nao_speech.py)
    nao_tactile (nao_driver/nao_tactile.py)
    nao_walker (nao_driver/nao_walker.py)

auto-starting new master
process[master]: started with pid [19585]
ROS_MASTER_URI=localhost:11311

setting /run_id to 79d95dc2-8379-11e3-8cbe-90b11c6e6bd9
process[rosout-1]: started with pid [19598]
started core service [/rosout]
ERROR: cannot launch node of type [nao_driver/nao_sensors_cpp]: cant locate node [nao_sensors_cpp] in package [nao_driver]
process[nao_walker-3]: started with pid [19610]
process[nao_controller-4]: started with pid [19611]
process[nao_behaviors-5]: started with pid [19612]
process[nao_leds-6]: started with pid [19615]
process[nao_speech-7]: started with pid [19618]
process[nao_tactile-8]: started with pid [19623]
failed to load symbols, rosdep will not function properly
/opt/ros/hydro/lib/rosout/rosout: symbol lookup error: /opt/ros/hydro/lib/libroscpp.so: undefined symbol: _ZN3ros6HeaderC1Ev
[WARN] [WallTime: 1390404352.268687] Inbound TCP/IP connection failed: connection from sender terminated before handshake header received. 0 bytes were received. Please check sender for additional details.
[rosout-1] process has died [pid 19598, exit code 127, cmd /opt/ros/hydro/lib/rosout/rosout __name:=rosout __log:=/home/MyName/.ros/log/79d95dc2-8379-11e3-8cbe-90b11c6e6bd9/rosout-1.log].
log file: /home/MyName/.ros/log/79d95dc2-8379-11e3-8cbe-90b11c6e6bd9/rosout-1*.log
respawning...
[rosout-1] restarting process
process[rosout-1]: started with pid [19751]
/opt/ros/hydro/lib/rosout/rosout: symbol lookup error: /opt/ros/hydro/lib/libroscpp.so: undefined symbol: _ZN3ros6HeaderC1Ev
[WARN] [WallTime: 1390404352.577597] Inbound TCP/IP connection failed: connection from sender terminated before handshake header received. 0 bytes were received. Please check sender for additional details.
[rosout-1] process has died [pid 19751, exit code 127, cmd /opt/ros/hydro/lib/rosout/rosout __name:=rosout __log:=/home/MyName/.ros/log/79d95dc2-8379-11e3-8cbe-90b11c6e6bd9/rosout-1.log].
log file: /home/MyName/.ros/log/79d95dc2-8379-11e3-8cbe-90b11c6e6bd9/rosout-1*.log
respawning...
[rosout-1] restarting process

Any help would be greatly appreciated.

Edit: Thank you AHornung, that seems to help a little. The errors has changed, but are still similar to what they were.

setting /run_id to f2362376-837f-11e3-b5cf-90b11c6e6bd9
process[rosout-1]: started with pid [20614]
started core service [/rosout]/
process[nao_sensors-2]: started with pid [20626]
process[nao_walker-3]: started with pid [20627]
process[nao_controller-4]: started with pid [20628]
process[nao_behaviors-5]: started with pid [20629]
process[nao_leds-6]: started with pid [20634]
Traceback (most recent call last):
  File "/opt/ros/hydro/lib/nao_driver/nao_sensors.py", line 44, in <module>
    from tf import transformations
  File "/opt/ros/hydro/lib/python2.7/dist-packages/tf/__init__.py", line 28, in <module>
    from _tf import *
ImportError: /opt/ros/hydro/lib ...