Proxy doesn't work fine with IExplorer

Question

Hi,
I've wrote a proxy using java and now I have a problem when running this proxy on linux and the browser is IE 5.5 or less.
The problem is like this. When a POST is made, Request arrives to Proxy , it sends it to server then receives the response and sends it back to browser. But in many cases the browser acts stupid. It says that "Page cannot be found" or "Response is empty". And I'm sure I send something on socket. - Works fine for GET.
Even more when the proxy runs on Windows the problem appears also but far less frequently. When proxy is on linux or Windows and I use Netscape , Mozilla or Opera, even IE 6.0. everything works fine
Is there a frequent mistake that I'm doing? Is there a standard fix for such a problem?
Thanks

Answer 1

Here are the request and response that cause problem:
POST /Validate.jsp HTTP/1.0
Accept: */*
Referer: http://192.168.4.52/Logon.jsp
Accept-Language: en-us
Accept-encoding: gzip, deflate
User-Agent: Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0; YComp 5.0.0.0)
Host: 192.168.4.52
Cookie: JSESSIONID=07A8B439050105DD75492B21A9ABF012
Pragma: no-cache
Content-Type: application/x-www-form-urlencoded
Content-Length: 66
HTTP/1.1 302 Moved Temporarily
Content-Type: text/html;charset=ISO-8859-1
Date: Tue, 09 Sep 2003 12:49:38 GMT
Pragma: no-cache
Location: http://192.168.4.52/inside/menu/MainFrames.jsp
Server: Apache Tomcat/4.0.3 (HTTP/1.1 Connector)
Cache-Control: no-cache
Connection: close
Expires: Thu, 01 Jan 1970 00:00:00 GMT
I don't modify the response, only forward what received from server. And in this case there is no content lenght.