uvcdynctrl doesn't work while libuvc_camera node is running

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I'm using uvcdynctrl to control my Logitech Quickcam Orbit AF webcam and using libuvc_camera as the driver for the webcam. I have a launch file that starts the camera node and runs image_view to display the camera feed.

When I type "uvcdynctrl -s 'Pan Reset' 1" in the terminal by itself, the camera moves as it is supposed to. But if I run the same command while the libuvc_camera node is running, I get the error "[libwebcam] Unable to open device 'video0'. Device not found."

The launch file that runs the camera node works on its own as well. It seems that there is some issue when both the ros node and uvcdynctrl are trying to access the same device.

My launch file that opens the libuvc_camera node is as follows:

<launch>
  <group ns="camera">
    <node pkg="libuvc_camera" type="camera_node" name="mycam">
      <!-- Parameters used to find the camera -->
      <param name="vendor" value="0x046d"/>
      <param name="product" value="0x0994"/>
      <param name="serial" value=""/>
      <!-- If the above parameters aren't unique, choose the first match: -->
      <param name="index" value="0"/>

      <!-- Image size and type -->
      <param name="width" value="640"/>
      <param name="height" value="480"/>
      <!-- choose whichever uncompressed format the camera supports: -->
      <param name="video_mode" value="uncompressed"/> <!-- or yuyv/nv12/jpeg -->
      <param name="frame_rate" value="15"/>

      <param name="timestamp_method" value="start"/> <!-- start of frame -->
      <param name="camera_info_url" value="file:///tmp/cam.yaml"/>

      <param name="auto_exposure" value="3"/> 
      <param name="auto_white_balance" value="false"/>

      <param name="auto_focus" value="True"/>
      <param name="brightness" value="1000"/>

    </node>

   <node name="image_view" pkg="image_view" type="image_view" respawn="false" output="screen" >
      <remap from="image" to="/camera/image_raw"/>
      <param name="autosize" value="true" />
   </node>
  </group>
</launch>