move_base avoids dynamic obstacles with kinect but does not avoid with hokuyo lidar

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Hello! I am beginner to ROS. I am using Ubuntu 14 and ROS Indigo. I searched for the same problem but cannot find the answer. I appreciate if anyone knows the answer.

I am using one Turtlebot2 with Kinect and one with Hokuyo lidar. I run the gmapping and amcl packages. When navigating with move_base in the map, Turtlebot with Kinect avoids dynamic obstacles but Turtlebot with Hokuyo does not avoid dynamic obstacles and hits them. What is the reason and what should I do to make the Hokuyo one to also avoid dynamic obstacles?

Content of the file on the path /opt/ros/indigo/share/turtlebot_description/robots/kobuki_hexagons_kinect.urdf.xacro is as below:

< ! --

- Base      : kobuki

- Stacks    : hexagons

- 3d Sensor : kinect

-->

<robot name="turtlebot" xmlns:xacro="http://ros.org/wiki/xacro">

<xacro:include filename="$(find hector_sensors_description)/urdf/hokuyo_utm30lx.urdf.xacro"/>

<xacro:include filename="$(find turtlebot_description)/urdf/turtlebot_common_library.urdf.xacro"/>

<xacro:include filename="$(find kobuki_description)/urdf/kobuki.urdf.xacro"/>

<xacro:include filename="$(find turtlebot_description)/urdf/stacks/hexagons.urdf.xacro"/>

<xacro:include filename="$(find turtlebot_description)/urdf/sensors/kinect.urdf.xacro"/>

<kobuki/>

<stack_hexagons parent="base_link"/>

<sensor_kinect parent="base_link"/>

<hokuyo_utm30lx_model name="hokuyo_laser" parent="base_link">

<origin xyz="0 0 +0.30" rpy="0 0 0" />

</hokuyo_utm30lx_model>

</robot>

Thanks in advance