Error in Rviz with Laserscan: says it dropped 100.00% of messages so far [closed]

edit

I am trying to visualize a fake laser scan using pointcloud and rviz. I made a launch file that seems to work.

<launch>
   <!-- kinect nodes -->
   <include file="$(find openni_launch)/launch/openni.launch"/>

   <!-- openni_manager -->

  <node pkg="nodelet" type="nodelet" name="openni_manager" output="screen" respawn="true" args="manager"/>

  <!-- throttling -->
  <node pkg="nodelet" type="nodelet" name="pointcloud_throttle" args="load pointcloud_to_laserscan/CloudThrottle openni_manager">
    <param name="max_rate" value="2"/>
    <remap from="cloud_in" to="/camera/depth/points"/>
    <remap from="cloud_out" to="cloud_throttled"/>
  </node>

  <!-- fake laser -->
  <node pkg="nodelet" type="nodelet" name="kinect_laser" args="load pointcloud_to_laserscan/CloudToScan openni_manager">
    <param name="output_frame_id" value="/camera_depth_frame"/>
    <remap from="cloud" to="cloud_throttled"/>
  </node>
</launch>

When launching

roslaunch pointcloud_to_laserscan openni_laser.launch

I do have a /scan topic and I can echo it to sees there are values published.

and then when I do rosrun rviz rviz I can see a perfect pointcould. I set Laserscan on /scan topic but it doesn't seem to receive any message. In fact, it says in the terminal that

[ WARN] [1366201830.911211858]: MessageFilter [target=/camera_depth_frame ]: Dropped 100.00% of messages so far. Please turn the [ros.rviz.message_notifier] rosconsole logger to DEBUG for more information.

Could anyone please help find the problem?