Please perform the steps exactly as indicate in our tutorial: http://www.hotspotsystem.com/installation-guide-dd-wrt
We advice you to press and hold the reset button on back of the router for 30 seconds while the router is powered on and perform our tutorial from scratch. You don’t need to install the firmware again, we just ask you to perform the settings again.
In case the issue remains please open a support ticket (http://www.hotspotsystem.com/hotspot_help/new-ticket) and attach screenshots of all you router administrator settings so we can have a look and indicate the incorrect setting.