setcookie()

[skdzines]

I am trying to pass a xreferrer_id to my index.php page and setting a cookie using

<?php
setcookie('xreferrer_id',$xreferrer_id,time()+1209600);
?>

I am passing it to index.php like so:
http://www.mysite.com/index.php?xreferrer_id=20

It is being passed to index.php and I can print it to the screen. However, when I try passing it to https://secure.mysite.com and using this to grab the cookie:

$xreferrer_id = $HTTP_COOKIE_VARS['xreferrer_id'];

It gets lost. Any ideas as to why? Could it be because it is going to https://secure from http:// ?

Thanks for your help.

[planetsim]

No need to double post