Warning: session_start(): Cannot send session cache limiter - headers already sent
<p>I am receiving this warning in a page while I try starting the session.</p>

<pre><code>&lt;?php
    session_start();
?&gt;
&lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"&gt;
&lt;html xmlns="http://www.w3.org/1999/xhtml" &gt;
&lt;head&gt;
    &lt;title&gt;Video&lt;/title&gt;
&lt;/head&gt;
</code></pre>

<p>-this is the part of the code. There are no characters (not even space) before the first line. This page is reached after logging in from another page, through redirection.
Any help?
(PHP version is 5.2)</p>
