xsens_driver error

edit

1. Linux: Ubuntu 12.04 LTS 32bits
2. ROS: fuerte
3. Intel core 2 duo E8400
4. device: Xsens MTi-G-28A53G35

I have some troubles when I launch mtdevice.py from http://ros.org/wiki/xsens_driver

I did as it said in http://answers.ros.org/question/42328/problem-with-xsens-mtig/ and I am sure making:

$ ls -la /dev/ttyUSB0 
$ sudo chmod a+rw /dev/ttyUSB0

And getting:

crw-rw-rw- 1 root dialout 188, 0 Jul 19 12:35 /dev/ttyUSB0

With all permissions.

The output problem is this:

$ rosrun xsens_driver mtdevice.py 
  File "/home/lsi-ros/workspace/sandbox/ethzasl_xsens_driver/xsens_driver/nodes/mtdevice.py", line 63
    print "MT: Write message id 0x%02X (%s) with %d data bytes: [%s]"%
                                                                     ^
SyntaxError: invalid syntax

I try with the launch too:

$ roslaunch lse_xsens_mti xsensDriver.launch

And the output is the same. Are there any problem with the code? Have I some broken dependency?

Thanks

Edit 1(22/07/2013):

The output of the roslaunch xsens_driver xsens_driver.launch is:

lsi-ros@lsi-ros:~/workspace/sandbox/lse_imu_drivers/lse_xsens_mti$ roslaunch xsens_driver xsens_driver.launch 
... logging to /home/lsi-ros/.ros/log/286c5d6e-f2c3-11e2-9adc-00241d11fce4/roslaunch-lsi-ros-10286.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 <a href="http://lsi-ros:60064/">http://lsi-ros:60064/</a>

SUMMARY
========

PARAMETERS
 * /rosdistro
 * /rosversion
 * /xsens_driver/frame_id

NODES
  /
    xsens_driver (xsens_driver/mtnode.py)

auto-starting new master
Exception AttributeError: AttributeError("'_DummyThread' object has no attribute '_Thread__block'",) in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored
process[master]: started with pid [10302]
ROS_MASTER_URI=http://localhost:11311

setting /run_id to 286c5d6e-f2c3-11e2-9adc-00241d11fce4
Exception AttributeError: AttributeError("'_DummyThread' object has no attribute '_Thread__block'",) in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored
process[rosout-1]: started with pid [10315]
started core service [/rosout]
Exception AttributeError: AttributeError("'_DummyThread' object has no attribute '_Thread__block'",) in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored
process[xsens_driver-2]: started with pid [10327]
Traceback (most recent call last):
  File "/home/lsi-ros/workspace/sandbox/ethzasl_xsens_driver/xsens_driver/nodes/mtnode.py", line 6, in <module>
    import mtdevice
  File "/home/lsi-ros/workspace/sandbox/ethzasl_xsens_driver/xsens_driver/nodes/mtdevice.py", line 63
    print "MT: Write message id 0x%02X (%s) with %d data bytes: [%s]"%
                                                                     ^
SyntaxError: invalid syntax
[xsens_driver-2] process has died [pid 10327, exit code 1, cmd /home/lsi-ros/workspace/sandbox/ethzasl_xsens_driver/xsens_driver/nodes/mtnode.py __name:=xsens_driver __log:=/home/lsi-ros/.ros/log/286c5d6e-f2c3-11e2-9adc-00241d11fce4/xsens_driver-2.log].
log file: /home/lsi-ros/.ros/log/286c5d6e-f2c3-11e2-9adc-00241d11fce4/xsens_driver-2*.log

And my roswtf is:

    lsi-ros@lsi-ros:~$ roswt
roswt: command not found
lsi-ros@lsi-ros:~$ roswtf
Loaded plugin tf.tfwtf
No package or stack in context
================================================================================
Static checks summary:

Found 2 error(s).

ERROR Not all paths in ROS_PACKAGE_PATH [/home/lsi-ros/workspace/amor-ros-pkg:/home/lsi-ros/workspace/dev:/home/lsi-ros/workspace/sandbox:/opt/ros/fuerte/stacks:/opt/ros/fuerte/share:/opt/ros/fuerte/share/ros] point to an existing directory: 
 * /home/lsi-ros/workspace/amor-ros-pkg

ERROR Not all paths in PYTHONPATH [/opt/ros/fuerte/share/ros/core/roslib/src:/opt/ros/fuerte/lib/python2.7/dist-packages:] point to a directory: 
 * /opt/ros/fuerte ...