[TYPO3] error after login

[a owen]

hi

when i log in with newloginbox i get this error (see attachement). i
want to use a hook and have following line in
newsloginbox/ext_localconf.php:
$TYPO3_CONF_VARS['EXTCONF']['newloginbox']['login_confirmed'][] =
'../../../fileadmin/php/functions.php:user_loadUserDefaults';

the funny thing is that when i uncomment it i still get the same error.
how is this possible

function user_loadUserDefaults() {
	//session_start();
	$_SESSION['trusted'] = 1;
	$_SESSION['uid'] = $GLOBALS['TSFE']->loginUser;
}

thanks for help
andi