Netgear modem problem, can't use router - help please.

I have a DM111p2 ADSL+2 modem. And I also have a Billion ADSL wireless router.

I am guessing these two hardware don't work together.

I just want to know if that's true or you can actually create a wireless LAN.

Now the weird thing is I DO HAVE my modem plugged into my router via Ethernet and another Ethernet cord into my PC and I do get internet. When I logged into my modems settings, typing "192.168.0.1" in my URL, their is no WEP keys or any keys for that matter. That is what first sparked my opinion on why my wireless router isn't working when I try to connect via wireless laptop.

Like I try to look for tutorials but EVERYTHING I look for has two Netgear products. Like, does Netgear modems work with other routers ?

Before I bought a netgear modem I had a iConnectAccess 621 broadband router.