Hello,
From a PC connect directly to the router. Set a static ip address on the 192.168.1.0 network and see if you can conenct to 192.168.1.1. You can also try this procedure with the 192.168.20 network.
It may be easiest to just go through the following procedure to reset the router: http://help.hotspotsystem.com/knowledgebase/forgotten-passwordresetting-openwrt-configuration