Error in Sessions

[ab4net]

Hi all,
i have Windows Professional XP SP2, with IIS and PHP5, Browser = IE7.0
i have created a test.php
and in that file there if only:
<?php
session_start();
?>
no any thing else, when am runnging the page (browsing it) it displays:

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at F:\www\cargov1\v2\app\test.php:1) in F:\www\cargov1\v2\app\test.php on line 2

please any advice appreciated ... !!!
thanks in advance ...

[NogDog]

Make sure there is absolutely nothing before the opening <?php tag, including spaces, tabs, or blank lines. If you still have a problem, make sure your editor is saving the file as plain ASCII text, as many editors will save a "BOM" character at the start of the file if you save it as Unicode, and it will generate output just as any other character will.

[ab4net]

many many thanks ... it was an editor problem ...
because i tried to make it the same page using the NotePad and got it work ...
so one more thing please, if am using a SharePoind Designer (New Frontpage) to text edit and manage website, how to set the page type not to UNICODE ?! or to set it to proper setings ...
thanks in advance ..