Error with Cookies and SSI

I am having a problem getting a php script to read a cookie that should be set. I have to incorporate the output of a php script into an existing page that uses SSI to do a virtual include of my php script. i.e. <!--#include virtual="script.php" --> Problem is, when I do this, the script does not set the cookie variables. If I just run the script the cookies are set, and read, correctly, but when I include the PHP script with the SSI call it does not read the cookie variables for some reason. Does anyone know a work-around for this? And using a std php script is not an option, I need a way to get this to work using SSI. Any help would be greatly appreciated. Thanks in advance, Ben