Dont know if you have logged on and configured anything. If you have a default connection to it or what but if you changed loads of settings to try and get it working th first thing to do is a factory reset.
Quote:
Reset to default settings Print
The following reset procedure will completely restore the default settings on the router including your password.
Step 1 Locate the reset pinhole on the back of the unit.
Step 2 With the router powered on, press and hold the Reset button.
Step 3 Hold the Reset button for about 10 seconds.
Step 4 Release the Reset button.
Step 5 The device is now at factory defaults.
The default username is admin and leave the password blank.
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After that the following is a list of default setup instructions to get your internet settings configured.
Open your web browser and enter the IP address of your router (192.168.0.1). Enter username (admin) and your password (leave blank).
Click on WAN on left-hand side of the screen. Select PPPoE.
Step 4 Select Dynamic PPPoE (unless your ISP supplied you with a static IP address).
Step 5 In the username field enter your username (IE
username@yourisp.net) and your password.
* Some Earthlink users may need to enter ELN/ before their username (IE ELN/username@earthlink.net).
Step 6 Maximum Idle Time should be set to zero. Set MTU to 1492, unless specified by your ISP, and set Autoreconnect to Enabled.
Note: If you experience problems accessing certain secure websites and/or email issues, please set the MTU to a lower number such as 1472, 1452, etc. Contact your ISP for more information and the proper MTU setting for your connection.
Step 7 Click Apply. When prompted, click Continue. Once the screen refreshes, unplug the power to the D-Link router.
Step 8 Turn off your DSL modem for 2-3 minutes. Turn back on. Once the modem has established a link to your ISP, plug the power back into the D-Link router. Wait about 30 seconds and log back into the router.
Step 9 Click on the Status tab in the web configuration where you can view the device info. Under WAN, click Connect. Click Continue when prompted. You should now see that the device info will show an IP address, verifying that the device has connected to a server and has been assigned an IP address.
And then to setup your ip addresses for your client pc's you should follow these instructions
Windows 2000/XP Print
Windows 2000/XP
To release and renew IP address, go to Start > Run. Type in CMD and press Enter. At the prompt, type in ipconfig and press Enter. This will display the adapter information such as IP address, Subnet mask, and default gateway.
To view additional information such as Mac address, DNS servers, etc, type in ipconfig /all.
To release IP address, type ipconfig /release.
To renew IP address, type ipconfig /renew.
If you are not able to get an IP address try setting one statically:
Windows 2000
Step 1 Right-click on My Network Places and select Properties.
Step 2 Right-click on the Local Area Connection which represents your network card and select Properties.
Step 3 Highlight Internet Protocol (TCP/IP) and click Properties. Enter your IP information for your network.
If connecting to a router, make sure the default gateway and a DNS server is the IP address of the router (192.168.0.1).
Windows XP
Step 4 Click on Start > Control Panel > Network and Internet Connections > Network connections.
Step 5 See Step 2 for Windows 2000 and continue from there.
Without more specific info thats all i can do

cant really setup a network without seeing it. Would prob be a 5 min job otherwise ><.
Heres a link to the router support page too where i got the instructions.
http://support.dlink.com/supportfaq/
If its a particular problem post some more detailed info ( router config, ip addresses and such ) and ill take a look.
or pm it to me if your worried about security
