Need help visualizing topics using Rviz and opennicamera plugin

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Hello, I'm trying to visualize the topics that are being published by my gazebo model using the opennicamera plugin, if I execute rostopic list this is the output:

peroanjo@peroanjoPC:~$ rostopic list

/camera/depth/camera_info
/camera/depth/image_raw
/camera/depth/image_raw/compressed
/camera/depth/image_raw/compressed/parameter_descriptions
/camera/depth/image_raw/compressed/parameter_updates
/camera/depth/image_raw/compressedDepth
/camera/depth/image_raw/compressedDepth/parameter_descriptions
/camera/depth/image_raw/compressedDepth/parameter_updates
/camera/depth/image_raw/theora
/camera/depth/image_raw/theora/parameter_descriptions
/camera/depth/image_raw/theora/parameter_updates
/camera/depth/points
/camera_ir/depth/camera_info
/camera_ir/parameter_descriptions
/camera_ir/parameter_updates
/clock
/gazebo/link_states
/gazebo/model_states
/gazebo/parameter_descriptions
/gazebo/parameter_updates
/gazebo/set_link_state
/gazebo/set_model_state
/gazebo_gui/parameter_descriptions
/gazebo_gui/parameter_updates
/p3dx/base_pose_ground_truth
/p3dx/cmd_vel
/p3dx/odom
/rosout
/rosout_agg
/tf

which makes me think that the topics are being published correctly, however when I open rviz and select the /camera/depth/image_raw topic, a warning shows up telling that there is no image being recevied. Does this mean that my .gazebo file isn't configured correctly? This is the part of my .gazebo file regarding the kinect camera:

    <!-- kinect -->
    <gazebo reference="kinect">
    <sensor name="camera" type="depth">
        <update_rate>20</update_rate>
        <camera>
          <horizontal_fov>1.047198</horizontal_fov>
          <image>
            <width>640</width>
            <height>480</height>
            <format>R8G8B8</format>
          </image>
          <clip>
            <near>0.05</near>
            <far>3</far>
          </clip>
        </camera>
<plugin name="camera_plugin" filename="libgazebo_ros_openni_kinect.so">
          <baseline>0.2</baseline>
          <alwaysOn>true</alwaysOn>
          <!-- Keep this zero, update_rate in the parent <sensor> tag
            will control the frame rate. -->
          <updateRate>0.0</updateRate>
          <cameraName>camera_ir</cameraName>
          <imageTopicName>/camera/depth/image_raw</imageTopicName>
          <cameraInfoTopicName>/camera/depth/camera_info</cameraInfoTopicName>
          <depthImageTopicName>/camera/depth/image_raw</depthImageTopicName>
          <depthImageInfoTopicName>/camera/depth/camera_info</depthImageInfoTopicName>
          <pointCloudTopicName>/camera/depth/points</pointCloudTopicName>
          <frameName>kinect</frameName>
          <pointCloudCutoff>0.05</pointCloudCutoff>
          <distortionK1>0</distortionK1>
          <distortionK2>0</distortionK2>
          <distortionK3>0</distortionK3>
          <distortionT1>0</distortionT1>
          <distortionT2>0</distortionT2>
          <CxPrime>0</CxPrime>
          <Cx>0</Cx>
          <Cy>0</Cy>
          <focalLength>0</focalLength>
          <hackBaseline>0</hackBaseline>
        </plugin>
      </sensor>
</gazebo>