Hello,
Have you confirmed through your ISP your internet is up? You can also do this by connecting a computer straight to the modem. If your interne is fine then continue with the steps below.
The default IP address of the router is 192.168.0.1 unless you changed the default address. If you were not trying the default ip address, try it now to see if you can access the configuration page.
Try to power cycle all of your equipment to see if it resolves your connection issues.
Turn off your modem and router. After 10 seconds power on your modem. After 30 seconds power on your router. On your computer, renew your IP address. If you are using windows, do the following,
Go to start , click run and type "cmd" or "command". A DOS window should open.
type
> ipconfig /release
then type
> ipconfig /renew
Check your ip address, it should be a 192.xx.xx.xx ip address which is assigned by your router, unless you configured it to use a different range of addresses.
If you are still unable to connect, I would recommend a reset of the device. This will delete any settings on the router and return it to factory default. There is a reset button on the back of the router you can press and hold for 10 seconds(is is a very small button on far right). Afterwards, try and connect to it and configure.
Below is a link to the support page where you can find the router manual. Click on "product manual". It is nice to have handy.
Click here Regards,
G33k