Keep-Alive header processing in IE

[Guest]

I configured the header "Keep-Alive: timeout=200" in the IIS server( by using
HTTP header option in IIS server's properties). In IE, I used HTTP 1.0. When
I send a request to IIS server (having Connection: keep-alive header), that
IIS server send a response header containing Connection: Keep-Alive,
Keep-Alive: timeout=200 and also the Content Length field. But IE closes that
connection after 1 min every time independent of time out value specified in
Keep-Alive header. I've tried this with many values like 20, 40, 100, 200,
10....etc. But the behaviour of IE is same irrespective of the value of keep
alive time out sent by web server.

I've tried the same configuration with the Mozilla and fire fox, It's
running fine with both of them.

I've tried many other format for this header for IE, like "Keep-Alive:
timeout=200, max=5", "Keep-Alive: 200"," Keep-Alive: max=5, timeout=200 ".
None of them works fine. Every time IE closes the connection after 1 min i.e.
the default keep alive time out of IE.

If anyone can help me for resolving this matter then I would be grateful for
that. I'm not able to understand how this keep alive header works for IE.