Your Wifidog client version (ipk and WHERE YOU GOT IF FROM or which version you compiled it from)
Your server SVN revision (run "svn info" in your wifidog-auth directory to get it)
Gateway config if the problem is with the gateway (wifidog.conf)
Wifidog gateway output messages (command : wifidog -f -d 7), for the period covering startup till you * reproduce the problem. (make sure the wifidog process is not already running before executing this command. You can stop it with "wifidog-init stop")
PHP error messages (make sure you set PHP to display them by setting "display_errors = On" in php.ini)