Error using joystick_remapper

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Hi, I'm trying to use the joystick_remapper, and I'm getting the following error every time I run the code:

[ERROR] [1349147615.365296561]: Client [/joystick2] wants topic /logitech to have datatype/md5sum [joy/Joy/e3ef016fcdf22397038b36036c66f7c8], but our version has [sensor_msgs/Joy/5a9ea5f83505693b71e785041e67a8bb]. Dropping connection.

My launch file looks like this:

<launch>

<node pkg="joy" type="joy_node" name="joystick1" >
  <remap from="joy" to="logitech" />
</node>

<node pkg="joystick_remapper" type="joystick_remapper.py" name="joystick2" >
  <remap from="joy_source" to="logitech" />
  <remap from="joy_des" to="joy" />
  <param name="button_mapping" type="str" value="=" />
  <param name="axis_mapping" type="str" value="=" />
</node>

</launch>

Can someone tell me how to make this work? Thanks!