asp.net masterpage & site navigation error
<p><img src="http://i.stack.imgur.com/umC5n.gif" alt="sourcecode1"><img src="http://i.stack.imgur.com/efRTs.gif" alt="error"></p>

<p>I got above error message. What have I done wrong and how do I fix my code?</p>

<p>Thanks,</p>

<p><img src="http://i.stack.imgur.com/bgc4F.gif" alt="sourcecode2"></p>
