title: Module translation is not translating
body: <p>I got a little problem with Magento translation in my module, because it does not work. It should be easy as all tutorials saying. There is a .csv-file in every app/locale/[xx_XX]/ - folder and also an entry in config.xml. I have a helper in my module, which is also registered in config.xml and I can use it. After all, I cleared all cachefiles and tried again.</p>
  
  <p>What did I wrong or what I forgot?</p>
  
  <p>The call in code:</p>
  
  <pre><code>$str = Mage::helper('mymodule')-&gt;__('mystring');
  </code></pre>
  
  <p>And in config.xml (tried this block in frontend, adminhtml and global namespaces): </p>
  
  <pre><code>&lt;translate&gt;
      &lt;modules&gt;
          &lt;Namespace_Module&gt;
              &lt;files&gt;
                  &lt;default&gt;Namespace_Module.csv&lt;/default&gt;
              &lt;/files&gt;
          &lt;/Namespace_Module&gt;
      &lt;/modules&gt;
  &lt;/translate&gt;
  </code></pre>