A few thoughts, without me having access to an Airport Base Station...
I presumed you had a (non-wireless) router connected to an Airport Base Station (for wireless networking). Then I started to think you might have a single, wireless router (made by D-Link). I'm a bit confused now, but maybe I'm just misunderstanding what you mean. Could you give a brief overview of what you have and how they connect?
On thing to raise is that the IP address should be 192.168.0.1 (rather than 19.2.168.0.1).
That said, if you indeed have a Base Station connected, in turn, to your router, I suspect you won't get into the router anyway using the above address. I could be wrong, but I expect the Base Station uses NAT (Network Address Translation) and that the addresses it hands out are something like 10.0.x.x. If you're new to this, perhaps try thinking of your router as being like your local sorting station for the Post Office and your Base Station as being a bit like your actual postman/mailman. In effect, the mailman acts as a go-between, but you, personally, only see the mailman as the next stage. If that makes sense...
I would suggest connecting your computer directly to the router (eg. via an ethernet cable), go to 192.168.0.1 in your web browser, and take it from there. You would then configure your router to be secure. After that, disconnect it and access the Base Station to secure that in turn. Well, that's the way I'd probably do it.
