Two suggestions:
1) Check the top of each page to see if the following lines are the first 3.
<?PHP
session_start();
session_register('menu');
2) Check the PHP.INI
;;;;;;;;;;;;;;;;;
; Data Handling ;
;;;;;;;;;;;;;;;;;
;
register_globals = On
The second one caused me a lot of pain because PHP installed itself with 'Off' as the default, subsequently I couldn't pass any variables until I turned it set it to 'On'.
Good Luck,
R. Shaw