title: java.lang.UnsupportedClassVersionError: Unsupported major.minor version 51.0 (unable to load class frontend.listener.StartupListener)
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/10382929/unsupported-major-minor-version-51-0">unsupported major .minor version 51.0</a>  </p>
  </blockquote>
  
  
  
  <p>I have eclipse indigo and tomcat 7.0.29. And still no Serlvets can be loaded!
  I have no other JDK or JRE than the 1.7 one!</p>
  
  <ul>
  <li>Compilance level 1.7</li>
  <li>JAVA_HOME point to JDK 1.7</li>
  <li>JAVA_JRE point to JRE 1.7</li>
  <li>build path contains JDK 1.7</li>
  <li>Java Facet 1.7</li>
  </ul>
  
  <p>..but still Unsupported major.minor version 51.0</p>