Problem with Loading html into div HELP HELP HELP

First if this is obviouse to som I am sorry as I am just starting with Javasript and ajax

I have created a simple page for a web site that replaces the text DIV with html from template pages to give a clen insertion and no page loads.

CODE------

// AJAX Send
function AjaxLoad(page_url, div_id)
{
      // register the callbacks
      var local_handle_reply = handle_reply;
      var local_handle_error = handle_error;

      // callback binder
      function bindcallback()
      {
            if (req.readyState == 4) {
                  if (req.status == 200) {
                        TEST:local_handle_reply(req.responseText, div_id);
                        //handle_reply();
                  } else {
                        local_handle_error(req);
                  }
            }
      }

      // send request to the server
      if (window.XMLHttpRequest)
      {
            //native XMLHttpRequest browsers
            var req = new XMLHttpRequest();
            req.onreadystatechange = bindcallback;
            req.open("GET", page_url, true);
            req.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
            req.send('');
      }
      
      else if (window.ActiveXObject)
      {
            // IE/Windows ActiveX browsers
            var req = new ActiveXObject("Microsoft.XMLHTTP");
            if (req)
            {
                  req.onreadystatechange = bindcallback;
                  req.open("GET", page_url, true);
                  //req.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
                  req.send('');
            }
      }
      return "done";
}

// AJAX handle_reply
function handle_reply(reply, div_id)
{
      document.getElementById(div_id).innerHTML = reply;

      // clean up
      delete(reply);
}      
      


// AJAX handle_error
function handle_error(req)
{

}

CODE ----

I have wampserver installed localy on my machine running

PHP Version 5.2.1

System       Windows NT COMPAQ 5.1 build 2600
Build Date       Feb 7 2007 23:10:31
Configure Command       cscript /nologo configure.js "--enable-snapshot-build" "--with-gd=shared"
Server API       Apache 2.0 Handler
Virtual Directory Support       enabled
Configuration File (php.ini) Path       C:\wamp\Apache2\bin\php.ini
PHP API       20041225
PHP Extension       20060613
Zend Extension       220060519
Debug Build       no
Thread Safety       enabled
Zend Memory Manager       enabled
IPv6 Support       enabled
Registered PHP Streams       php, file, data, http, ftp, compress.zlib
Registered Stream Socket Transports       tcp, udp
Registered Stream Filters       convert.iconv.*, string.rot13, string.toupper, string.tolower, string.strip_tags, convert.*, consumed, zlib.*


it works fine exactly as planned. BUT I upload to my web server witch is running

PHP Version 4.4.4

System       Linux universe.websiteactive.com 2.6.18.2-ts.grh.mh.i386 #1 SMP Sat Nov 18 04:56:38 CST 2006 i686
Build Date       Aug 28 2006 07:25:30
Configure Command       './configure' '--with-apxs=/usr/local/apache/bin/apxs' '--prefix=/usr/local' '--with-xml' '--enable-bcmath' '--enable-calendar' '--with-curl' '--with-dom' '--with-dom-xslt' '--with-dom-exslt' '--enable-exif' '--enable-ftp' '--with-gd' '--with-jpeg-dir=/usr/local' '--with-png-dir=/usr' '--with-xpm-dir=/usr/X11R6' '--with-gettext' '--with-iconv' '--with-imap=/usr/local/imap-2004g' '--enable-mbstring' '--enable-mbstr-enc-trans' '--enable-mbregex' '--with-mcrypt' '--with-mhash' '--enable-magic-quotes' '--with-mysqli' '--with-mysql=/usr' '--with-openssl' '--enable-discard-path' '--with-pear' '--with-pspell' '--enable-sockets' '--enable-track-vars' '--with-ttf' '--with-freetype-dir=/usr' '--enable-gd-native-ttf' '--enable-wddx' '--with-zip' '--with-zlib'
Server API       Apache
Virtual Directory Support       disabled
Configuration File (php.ini) Path       /usr/local/Zend/etc/php.ini
PHP API       20020918
PHP Extension       20020429
Zend Extension       20050606
Debug Build       no
Zend Memory Manager       enabled
Thread Safety       disabled
Registered PHP Streams       php, http, ftp, https, ftps, compress.zlib

and nothing happens. There are no errors no warnings nothing it just dont work

WHAT AM I MISSING HERE.  PLEASE HELP

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