Code:
<IfModule mod_headers.c>
  SetEnvif Client value Get-Duration
  Header add Duration "%D" env=Get-Duration
</IfModule>
this is the output for my apache server but its giving me the method not implemented i have no idea why

Code:
Escape character is '^]'.
Get /tests/10KB HTTP/1.1
Client: Get-Duration
HOST: localhost

HTTP/1.1 501 Method Not Implemented
Date: Fri, 28 May 2010 02:55:08 GMT
Server: Apache/2.0.58 (Unix) PHP/5.1.4
Allow: GET,HEAD,POST,OPTIONS,TRACE
Content-Length: 309
Connection: close
Content-Type: text/html; charset=iso-8859-1

<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>501 Method Not Implemented</title>
</head><body>
<h1>Method Not Implemented</h1>
<p>Get to /tests/10KB not supported.<br />
</p>
<hr>