I am having problems getting remote debugging to work

My environment is that my browser is IE 7 running under Windows Server 08

My webserver is IIS 6 running on Windows Server 03

I have followed all of the instructions as far as I can:

Here is the output of dbg-wizard.php

PHP Version: 5.2.4
Web Server: Microsoft-IIS/6.0
Server Name: phped.sbwh.com
Platform: WINNT/x86
Your Client IP Address: ******
Your Server IP Address: not determined
Port: 80
Your Web Server and PhpED are on different machines
Path to website files: F:\wwwroot\
Document Root is: F:\wwwroot\
Your PHP.INI file is: C:\Program Files\PHP\php.ini
PHP extensions directory is: C:\Program Files\PHP\ext
DBG (PHP DEBUGGER) Version 3.4.2 is INSTALLED

As you can see - the correct debugger DLL module has been copied to the PHP extensions folder

I have added the appropriate text to php.ini on the webserver -

;;;;;;;;;;;;;;;;;;;;;;
; Dynamic Extensions ;
;;;;;;;;;;;;;;;;;;;;;;
;
; If you wish to have an extension loaded automatically, use the following
; syntax:
;
; extension=modulename.extension
;
; For example, on Windows:
;
; extension=msql.dll
;
; ... or under UNIX:
;
; extension=msql.so
;
; Note that it should be the name of the module only; no directory information
; needs to go here. Specify the location of the extension with the
; extension_dir directive above.

extension=dbg-php-5.2.dll
[debugger]
debugger.hosts_allow= 10.11.10.11
debugger.hosts_deny=ALL
debugger.ports=7869


I brought up a php page in IE that simply contained

<?php
phpinfo();
var_dump(gd_info());
?>

and then clicked the "Debug this page" button on the phpED IE toolbar - and get the following error:

DBG 3.4.2

Failed to start DBG session


Reason: protocol error ()
Not sure what it means? Visit http://www.nusphere.com/dbg/ for troubleshooting.


Debugger request: "41521;d=1,c=0"
Request found in: "$_COOKIE['DBGSESSID']"
Target PHP version: "5.2.x"
Server API: "ISAPI"
Extensions API: "220060519"
Modules API: "20060613"
PHP API: "20041225"

Any ideas what I'm doing wrong ?