OK now we know what your default gateway is but for some reason your network isn't picking it up so you can try typing it in manually into your IPv4 properties window.
Open the
Network and Sharing Center by right-clicking on the network icon in the System Tray at the lower right-hand corner of your screen. Once there, click
Change Adapter Settings on the left side of the window.
This will take you to a listing of your installed network adapters. Locate the adapter you’re using, right-click it and select
Properties. In the
Connection Properties window, select the
Internet Protocol Version 4 line (shown above) and click the
Properties button below.
Once in
Properties, click the
Advanced button, and use the
Add feature under Default gateways to add your router’s IP address.
In your case enter 192.168.0.1, Once entered, click
OK and/or
Close until you’re out of the network configuration windows. Reboot the machine and see if you have a connection. Check your ipconfig /all to make sure that the default gateway you entered is there.
I believe the reason this is happening is because your router is at it's EOL "end of life" and therefore is no longer supported by D-link. Because of this there are no firmware updates which would allow your router to work with Windows 7. So this is only a work around for a firmware problem has I originally suspected.
http://www.dlink.com/products/?pid=487