403 Socket error

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C#

VB

I have been working on a proxy server and have been using sockets to request data from web servers but now i then i get a Forbidden 403 error with 'directory listing denied' and yet when i test the request headder in fiddler it works in returning the page but looking at the logs it shows.

HTTP Pipelining Client detected; excess data on client socket for session #1.

Not sure what this i telling me but shown below is sample code that produces the 403 error.

string Request = "GET http://www.bmw.co.uk/bmwuk/homepage/ HTTP/1.1\r\n";
            Request += "Host: www.bmw.co.uk\r\n";
            Request += "Referer: www.bmw.co.uk\r\n\r\n";
            IPEndPoint Ep = new IPEndPoint(Dns.GetHostEntry("www.bmw.co.uk").AddressList[0], 80);
            Socket Soc= new Socket(Ep.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
            Soc.Connect(Ep);
            Soc.ReceiveBufferSize = 1024;
            Soc.Send(ASCIIEncoding.ASCII.GetBytes(Request));
            byte[] Buffer = new byte[1024];
            int BytesReply=Soc.Receive(Buffer);
            string strReply=ASCIIEncoding.ASCII.GetString(Buffer);
            Soc.Close();

Typing "www.bmw.co.uk/bmwuk/homepage/[^] in to a browser show the page and not the directory so i would guess the folder uses a default web page.

Some sites are coded to check the Referer string but as you can see i've sent it and i also tried tweaking the buffer size so i'm a bit stuck on this one if anyone has the answer.