stupid problem here. i have a login page that starts a session variable and sets $_SESSION['username'] = "some_value".
if i navigate to another page within the same directory i can read $_SESSION['username'] variable, but if i navigate to a page in a different directory on my site i cannot. i check it with isset() which returns false.
any ideas, is it some thing to do with my .ini or my .htaccess files?
many thanks for any advice.