User ID tracking in my PHP scripts + 'new_rewrite' Impossible?

Hello everybody!
I need to track usage of my php scripts by registered members.

aMember manual says, that I need to use this variable:

Code:

$_SESSION[ '_amember_user' ][ 'member_id' ]

But!!!
It has '0'or is undefined in some cases when 'new_rewrite' is used. The strange thing is that amember still lets user see and reload protected scripts.

I've tried folowing vars in my tracker function:

Code:

$HTTP_SESSION_VARS['_amember_id']

- gives less 'Untracked' members but still not 100% perfect.

Code:

$HTTP_SESSION_VARS['_amember_login'] 
$HTTP_COOKIE_VARS['_amember_ru']
$HTTP_SESSION_VARS['_amember_id']

Give not much help either.

Sure I'm using

Code:

session_start() 
//and 
global $HTTP_COOKIE_VARS, $HTTP_SESSION_VARS, $_SESSION;

Is there any way to get user_id or login in php script in prodected dir (with new_rewrite) in 100% of times when he is loading/reloading this script?