Problems with using gmapping - cannot launch node.

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I request your help in getting started with gmapping on robotino. I have just checked out the robotino-ros-pkg using svn and run 'rosmake robotino' without any errors. Now when I want to launch gmapping using: roslaunch robotino_navigation gmapping.launch, I get the following error:

sam3891@sam3891-ThinkPad-SL400:~$ roslaunch robotino_navigation gmapping.launch
========

PARAMETERS
* /rosdistro: indigo
* /rosversion: 1.11.10
* /slam_gmapping/xmax: 20
* /slam_gmapping/xmin: -20
* /slam_gmapping/ymax: 20
* /slam_gmapping/ymin: -20

NODES
/
slam_gmapping (gmapping/slam_gmapping)
auto-starting new master
process[master]: started with pid [9008]
ROS_MASTER_URI=http://localhost:11311

setting /run_id to 3968f884-97fe-11e4-a8ea-0026186f16cc
process[rosout-1]: started with pid [9021]
started core service [/rosout]
ERROR: cannot launch node of type [gmapping/slam_gmapping]: gmapping
ROS path [0]=/opt/ros/indigo/share/ros
ROS path [1]=/usr/include/pcl-1.7/
ROS path [2]=/home/sam3891/robotino-ros-pkg
ROS path [3]=/opt/ros/indigo/share
ROS path [4]=/opt/ros/indigo/stacks

Is there any step that I am missing between download the robotino-ros-pkg and implementing gmapping? Do I need to download any extra packages? If so, how do I link it to ROS? Can someone help please?

Here is the gmapping.launch file:

<launch>
  <node name="slam_gmapping" pkg="gmapping" type="slam_gmapping">
    <param name="xmin" value="-20" />
    <param name="xmax" value="20" />
    <param name="ymin" value="-20" />
    <param name="ymax" value="20" />
  </node>
<!-- Run rviz -->
<include file="$(find robotino_navigation)/launch/rviz.launch" />
</launch>