I cant connect my D-link model DGL-4500 to a wireless modem. It also would not fully install, saying that I didnt have a lan cabel pluged into my laptop to my router even tho I disabled my wireless adapter and turned on my LAN port. I tried entering the modems name and password into the config PPPoE settings on the Dlink, but it still would not connect.

Steps for these found on http://support.xbox.com/en-US/xbox-live/connecting/error-cant-obtain-ip-address-router-modem-978976 and include
1. Restart modem and router2. Check wireless password3. Configure IP settings manually 4. Set an alternate MAC Address5. Turn on DHCP.6. Bypass router entirely and connect instead to the modem using a wired connection

If the default password on the D-Link has been changed then-
To reset the D-Link back to the default settings -
Press and hold the RESET button at the back of the router with the power ONuntil the LEDs flash at the time the release the RESET button.
Connect a LAN cable from the D-Link to your laptop/computer's LAN port, openthe browser on your laptop/computer and enter the D-Link's configuration URL..
http://192.168.0.1
The default login = admin
The default PW = blank (just press Enter) You can now change the default admin password.
You can now configure the wireless settings. Now configure the wireless card in your computer/laptop withthe router's wireless settings.
To secure your wireless network from unauthorized access,please click on this link and follow my instructions :- http://www.fixya.com/support/r3559128-wireless_router_security

Make sure you have the latest firmware as this might help with your dropped connections. Also try to make a DHCP Reservation for each computer connected to your network (p. 32 in the User Manual), as that can also help prevent dropped connections.

Download the latest firmware ver. 1.23NA to your local computer. Connect your DGL-4500 router via a wired connection (ethernet) to your computer and install the firmware update following instructions in the user manual.

Firmware link:
ftp://ftp.dlink.com/Gateway/dgl4500/firmware/dgl4500_FW_123NA.zip

Here is the PDF link to the User Manual:
http://www.dlink.com/-/media/Consumer_Products/DGL/DGL%204500/Manual/DGL%204500_Manual_EN_US.pdf

I have used Cat5e plenum Cable for my internet connection and I faced same problem. If you are just concerned with internet access and not access between devices on your LAN, then you just need to connect the first router LAN to the WAN port of the second router with the mentioned Ethernet cable. It is also in your best interest to make sure the IP ranges are different between the two DHCP servers you now have. That is, make sure they are not on the same subnet or serving up conflicting IP's.

If there was a code to unlock it please get help where you bought it. And please test it before you leave the counter.

go to D-Link - TechSupport FAQ, they have a tool to help configure routers,

If you don't see any devices connected in the DHCP client list on the router interface even when you are sure of the devices being connected, only a firmware update or a re-flashing of firmware can help. You can find the latest firmware available on the d-link support site. You can verify the model and version numbers and download the corresponding firmware. This is only fix.

i think its working.Connect the ethernet port of moden to wlan of wireless

make sure the dsl modem is in bridge mode. you do this by connecting directly to the modem then accessing modem configuration page. after doing this connect the way everything was before. now go to router admin page, then setup tab at the top, then choose internet, manual setup. in the place where its says my internet connection is select PPPoE. then put in your dsl username, password and etc. save settings. this should fix the problem

you need to connect directly to the modem, then go to configuration page it should be stated in the modem manual. there you need to make the modem in bridge mode nothing else. apply settings and yur ready to blast off.