basically you have to use your modem router as a router only, so these are the only settings to be done. I am using it as a modem router for my adsl connection, but have setup the same as yours at another place. Does it have to do anything with your D-Link MAC address you have to feed to BEAM modem ? Had encountered the same situation while setting up HATHWAY cable BB at my friend's place. We had to inform hathway about our router MAC address then only it got connected.
Secondly wifi is working means your dlink modem is working fine, it is not getting internet connection through beam modem.
Secondly wifi is working means your dlink modem is working fine, it is not getting internet connection through beam modem.
