Apache and WebService question again

Hi, all

I am using Apache 1.3.26 under Debain Woody. I am using Apache as a firewall
redirect all the http request to my win2000 IIS server. At first, I used
rewriterule to do
pass my request to the win2000 IIS. In my httpd.conf, I have follow setting:

<VirtualHost *>
ServerName guides.com
ServerAlias guides.com *.guides.com
RewriteEngine on
RewriteLogLevel 9
....
RewriteRule ^/WebServuce/API/(.*) http://100.90.80.3/WebService/API/$1
[P,L]
</VirtualHost>

I write a webservice under MS.Net and sit in the
http://100.90.80.3/WebService/API/mywebservice.asxm
When I use IE to browse the webservice
http://guides.com/WebService/API/mywebservice.asxm, it works fine and I can
get the web service derscription. But once I try to add the webserivice into
my project web reference. My VS.net said
Unable to download follow files from
http://100.90.80.3/WebService/API/my...vice.asxm?wsdl
It looks like it try to use my actual win2000 box machine ip address which
of course can not be seen from my client (Dev) machine.

Then I found that ProxyPass & ProxyPassReverse directive are what I need,
so I change my httpd.conf to
<VirtualHost *>
ServerName guides.com
ServerAlias guides.com *.guides.com
ProxyPass /WebServuce/API/ http://100.90.80.3/WebService/API
ProxyPassReverse /WebServuce/API/ http://100.90.80.3/WebService/API
</VirtualHost>

But I still got the same result, it looks like my VS.Net 2003 always get
back http://100.90.80.3/WebService/API/mywebservice.asxm

In the http://httpd.apache.org/docs/mod/mod...html#proxypass, it
should pass me back as "http://guides.com/WebService/API/mywebservice.asxm"

And thanks for Justin Koivisto's suggestion, I will try useing
port-forwarding and ip masquerading to do this later. But I think use
"ProxyPassReverse" is ideal.

Anyone can give more suggestion?

Sorry for my long post.

Cheers,
Tao