title: log4net EventLogAppender on windows 7 problems
body: <p>Hello I have problem with EventLogAppender on the Windows7.
  Code for config EventLogAppender is:</p>
  
  <pre><code>       var elAppender = new EventLogAppender
              {
                  ApplicationName = "MyLog",
                  LogName = "MyLog",
                  Layout = new PatternLayout(default_format),
                  Threshold = Level.Error
              };
  </code></pre>
  
  <p>The error message is:</p>
  
  <pre><code>The source was not found, but some or all event logs could not be searched.  Inaccessible logs: Security.
  </code></pre>
  
  <p>Could you help me to resolve this problem?
  Thanks.</p>