I just bought a new router and installed DD-WRT on it. When I connect to the router via wi-fi, I cannot get an outside internet connection (and in fact, can not connect to the router admin interface at 192.168.1.1). If I connect to it with an ethernet cable, I can get an outside connection just fine. At first that wasn't the case, but I cloned the MAC address of my old router as suggested here, and now get an outside connection.
I've tried to duplicate the settings from my old router as best I can (it was also running DD-WRT), but to no avail. What steps can I take to troubleshoot and solve this problem?