Error message in web.config file

 Hello. I am getting this message in my web.config.file :
Error 1 The 'controls' start tag on line 79 does not match the end tag of 'pages'. Line 102, position 5.   

Here is part of file. I trying to do this for hours without results. The problem started when I install the new Visual Studio 2008 in my computer.

 

1    <?xml version="1.0"?>
2    <!--   Note: As an alternative to hand editing this file you can use the
3        web admin tool to configure settings for your application. Use
4        the Website->Asp.Net Configuration option in Visual Studio.
5        A full list of settings and comments can be ...