robot is not moving in rviz

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Hi, i have a model, it is working fine in gazebo but in rviz it is not moving at all. The wheels are rotating but the robot's position is not changing at all.

Here are mu links: I used dummy link in rviz global fixed frame.

    <link name="dummy">
   </link>

  <link name="link_chassis">
    <!-- pose and inertial -->
    <pose>0 0 0.1 0 0 0</pose>
    <inertial>
      <mass value="5"/>
      <origin rpy="0 0 0" xyz="0 0 0.1"/>
      <inertia ixx="0.0395416666667" ixy="0" ixz="0" iyy="0.106208333333" iyz="0" izz="0.106208333333"/>
    </inertial>
    <!-- body -->
    <collision name="collision_chassis">
      <geometry>
        <box size="0.5 0.3 0.07"/>
      </geometry>
    </collision>
    <visual>
      <origin rpy="0 0 0" xyz="0 0 0"/>
      <geometry>
        <box size="0.5 0.3 0.07"/>
      </geometry>
      <material name="blue"/>
    </visual>
    <!-- caster front -->

  </link>

    <joint name="dummy_joint" type="fixed">
     <parent link="dummy"/>
     <child link="link_chassis"/>
   </joint>


  <link name="sensor_laser">
    <inertial>
      <origin xyz="0 0 0" rpy="0 0 0" />
      <mass value="1" />
      <xacro:cylinder_inertia mass="1" r="0.05" l="0.1" />
    </inertial>

    <visual>
      <origin xyz="0 0 0" rpy="0 0 0" />
      <geometry>
        <cylinder radius="0.05" length="0.1"/>
      </geometry>
      <material name="white" />
    </visual>

    <collision>
      <origin xyz="0 0 0" rpy="0 0 0"/>
      <geometry>
        <cylinder radius="0.05" length="0.1"/>
      </geometry>
    </collision>
  </link>

  <joint name="joint_sensor_laser" type="fixed">
    <origin xyz="0.15 0 0.05" rpy="0 0 0"/>
    <parent link="link_chassis"/> 
    <child link="sensor_laser"/>
  </joint>