script not working outside of network

[Chris O'Shea]

lo all,

currently a university student and we have access to a private network that we can use for our php projects i can access them automatically from inside the campus but from out side i must enter my username and password

when im running my scripts from inside the campus they work perfectly, and when running my scripts on my own server they also work perfectly, but when accessing my project site from outside the campus the html loads but certain parts of the script dont load. Im pretty sure the only thing not running is :


<?
session_start();
header("Cache-control: private");
?>


i use this to check that a user is logged in, using a session variable which is set when a user logs in

I dont quite no why it works on the server in campus but not remotely :S

any ideas


thanks,

Chris.