Intensity values only reads 0 from sicks300

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Hi I want to read intensity values from a SICK S3000 and use the ROS driver sicks300. I use reflectors in front of the laser. I do get ranges in form of:

ranges: [0.3799999952316284, 0.36000001430511475, 0.3700000047683716, ...]

but only get:

intensities: [0.0, 0.0, 0.0, 0.0, ...]

To produce the bag file, I use a launch file with the following parameters:

    <node name="sick300_driver" pkg="sicks300" type="sick300_driver" output="screen">
    <param name="devicename" type="string" value="/dev/ttyS1"/>
    <param name="angle" type="int" value="180"/>
<param name="resolution" type="double" value="0.5"/>
<param name="baudrate" type="int" value="115200"/> 
<remap from="/laserscan" to="/sicks300laser" />
</node>

What am I missing? I'm new to ROS, but have worked a little in player before.