IMU in hector_slam?

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Hi! I have a neato xv-11 and I have built a map with hector_slam. In my launch file I have add "hector_imu_attitude_to_tf" node and when I type "$ rosrun hector_imu_attitude_to_tf imu_attitude_to_tf_node" I haven't errors. My launch file is below. When I launch the launch file, in rviz I can't rotate my xv-11 around the z axis otherwise the map does not conform to reality. What am I doing wrong? If I connect an IMU could solve the problem? Thank!

<node pkg="hector_imu_attitude_to_tf" type="imu_attitude_to_tf_node" name="imu_attitude_to_tf_node" output="screen">
<remap from="imu_topic" to="thumper_imu"/>
<param name="base_stabilized_frame" type="string" value="base_stabilized"/>
<param name="base_frame" type="string" value="base_footprint"/>
</node>