HTTP-POST Uri format

[CFloyd]

I have a web service client that sends an XML string to the web service for
processing. I alos have to add some headers to the post. I first establish
the baseuri as
===
baseuri = new
Uri("http://192.168.100.67/mimservice/mimosawebservic e.asmx/MWS32Service
===
Then I pass the uri and the xml string along to another method the includes:
===
HttpWebRequest req = (HttpWebRequest )HttpWebRequest .Create( url);
req.Method = "POST";
req.Headers.Add ("MIMInterfa ce: mim_0003");
req.Headers.Add ("MIMSchemaName : V3-0-0003-02Connect.xsd") ;
=== I use some stream methods to load the XML string into the request and then
post it
===
result = req.GetResponse ();

=====
The problem is this: I can't seem to get the uri formatted correctly. At one
time I had it working, made some changes and lost my working format. I don't
think the uri format shown above is correctly, it certainly doeesn't work. I
tried the same string that the browser test app uses with the
.....amsx?op=Me thodName syntax, and that doesn't work.

I have used a proxy (both web ref and wsdl.exe created) to post my queries,
so I know everything else is working OK.
1) How does the uri/webmethod need to be formatted for the request? -OR-
2) How can I set the headers if I use a proxy?

I have 2 constraints: 1) Must use HTTP-POST with 2 headers
2) Must have dynamic uri capability for ease of deployment

Thanks,
Charlie Floyd