can't start session from a php cgi script...

I am running a script, test.cgi, and attempting to start a php session using session_start()

the script is:

#!/usr/local/bin/php
<?
session_start();

(more code in here...)

all i get is an error message:

Warning: Cannot send session cache limiter - headers already sent (\pathtofile\test.cgi:2) in \pathtofile\test.cgi line 3

The session handling works fine on the parts of the site running as .php files...

i have to run this script as a .cgi because of security restrictions imposed by the isp

other .cgi scripts run fine without the session_start()

i can't get the session to start though!

can anyone help? please?

thanks in advance

Can you omit the line:
#!/usr/local/bin/php
?

According to your error, something is already sending output to your browser before you do your session_start();

session info must be sent before any other output with the exception of Header() stuff and cookies

thanks for the responses guys

unfortunately my isp tells me I can't omit the line
#!/usr/local/bin/php

& i think that line is the "output" that is being sent to the browser...

have tried removing the line break after the <?

i.e. <? session_start(); ?>

and even

<?session_start(); ?>

but still get the same error message...

help!