Problem applying gazebo 7 materials

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Hi,

I Iam trying to use diferente materials in my model but it is not working. It just accept colors like: Gazebo/White, Gazebo/Red, etc. If I try to use Gazebo/SmileyHappy, for example, it doesn't work. I can't finde the gazebo.material script in my gazebo package " media/materials/scripts/gazebo.material".

What I have in my model to define the material is:

      <material>
        <script>
          <uri>file://media/materials/scripts/gazebo.material</uri>
          <name>Gazebo/SmileyHappy</name>
        </script>
      </material>

Thanks,