You have to run the program "Ipconfig".
Open the command line tool.
This has to be somewhere in your start menu.
If you don't find it, open the "Run"-menupoint
and type cmd into it. Hit return. A window with black
background should open, offering a commandline.
Enter "ipconfig" without "".
The first line in return shows your IP.
This IP needs to be entered instead of the one
already showing in the router interface screeny.

However there's one issue with this,
atm I've no idea if your machine keeps this
number or is assigned a different one by the router
every time (once per day). So this might work only
one time for you.
But I promise you drisos, as soon as I find it out,
I'll do everything to get your machine to do what
mine does.