in the helpergrouprules.php file, change line 1-3:
<?php
function WA_Auth_GetComparisonsForRule($ruleName){
to:
<?php
@session_start();
function WA_Auth_GetComparisonsForRule($ruleName){
if that does not fix the problem, we'll need to do some testing to find out the cause. the first test is to use the sessionTest file from the following thread to make sure session management is working on your server:
showpost.php?p=23826&postcount=2
if the session test fails, it is most likely the session.save_path setting in the php.ini file, you will need to contact the host to have them correct the problem.