SICK LMS 200 not connects with Pionner P3AT

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HI,

I'm trying to use the Sick lms 200 in indigo, but I can not connect. The sicktoolbox_wrapper always sends the message

A Timeout Occurred! 2 tries remaining
A Timeout Occurred! 1 tries remaining
A Timeout Occurred - SickLIDAR::_sendMessageAndGetReply: Attempted max number of tries w/o success!

I am using the following launcher in Pionner P3at:

<launch>
    <node pkg="sicktoolbox_wrapper" type="sicklms" name="sicklms_node" >
            <param name="port" type="string" value="/dev/ttyS1" />
            <param name="baud" type="int" value="38400" />
            <param name="angle" type="int" value="180" />
            <param name="resolution"  value="1" />
            <param name="connect_delay"  value="30" />
    </node>

</launch>

Anyone know where the error?