We want to hook up our router to an xp with a new ip address and we do not know how to hook it up.It is a dl-774 router.

You do not need to buy a new router, you just need to find out what the IP address is for the one you have.
then you have to look at your users manual under setup the IP address, and set it up...
An IP address has 000.000.000.000 each of the three numbers between the dots can be from 0-255.
It looks for an IP address for a certain period of time, when it cannot find the device's IP address that you have it hooked up to, it times out.
So, what ever device you have it hooked up to, you really need to know it's IP address.
to find out you need to call the manufacturer of the device and ask them what is the default IP address on the device you purchased. Or if you are hooked up to a cable modem the IP address should be on the label under the cable modem. Or you can call for a service call from the cable company for help.

You probably have a static ip address set on one of the pc's. The router is set to give out ip addresses automatically. If one of the pc's has a static ip address set,(within the range of addresses that the router is dishing out) then the router may try to give out that address, see that it is already in use, and produce the error.

This is easy to fix:

For xp:
go to the control panel, then to network connections. Right click on your network connection, and left click on properties. In the white area of the window that pops up, click on 'internet protocol tcp/ip' and click properties.

For vista:
Go to the control panel, network and sharing centre, then click on manage network connections, right click on your network adapter, left click properties. Click on internet protocol version 4 (uncheck version 6 if it is checked) and check for auto ip and dns just like in xp.

Both pc's should be set to obtain an ip address and dns server automatically. If there are numbers in either area, this is the problem for sure. Make sure both are set to get an address automatically, reboot router and both pc's and that should be the end of it :)

Please post a comment and let me know how you make out.

You're talking about just hooking your PC directly into the cable/dsl modem?
If so, you should be able to just unplug the LAN cable from the router and hook it into your modem. 
(Most XP/Vista installs are set to seek out a DHCP server to get an IP. Your home router was your DHCP server before, hence the 192.168.x.x addresses.)

Is this the DSL router that comes from the ISP or is this one that you purchased for this purpose?

The problem would seem to be that you are probably only getting one IP address. If this router is from the ISP then you are probably only getting one IP address. If this the case you will need to either request another router that has the ability to act as a DHCP server. If this is not an option, then my solution would be to get another router/switch that will provide IP addressing. This would solve your problem.

However, with not knowing whether you are getting ip addresses on both computers this is just my best guess based on the information provided.

Hope this helps.

Hi,
The first thing I would do is check to make sure the desktop with XP has the network card set to "obtain an IP address automatically"

if it is set to obtain an ip address automatically, I need to know the following:

What is the IP addresss of the router?
What is the IP address of the Vista computer?
What is the IP address of the xp computer?

You can find the ip address by going to start, then run, then type cmd and hit enter. at a command prompt type: ipconfig and hit enter.

Yes, the xp machine connects to the net. DHCP is not enabled. The ipconfig/all command brings up the correct static ip address, subnet mask, and default gateway. But it does also say under the ip configuration that ip routing is not enabled. I did have the 2000 machine connected when I first set up the router yesterday, but I booted up my laptop to try to set up a wireless connection, and then I had to reinstall the entire router set-up.

This FAQ is for the DI-514, DI-524, DI-604, DI-614+, DI-624, DI-624S, DI-714P+, DI-754, DI-764, DI-774, DI-784, DI-804HV, and DI-808HV. Universal Plug and Play (UPnP) allows discovery of UPnP enabled devices in a network environment. UPnP is only available on Windows Me and XP. If you are not using either operating system on any of your computers, or do not want to use UPnP, then it is recommended to disable UPnP on the router. Step 1 Open a web browser and type the IP address of the wireless router in the address bar (default is 192.168.0.1). Press Enter. Step 2 The default username is admin (all lower case) and the default password is blank (nothing). Click OK. Step 3 Click the Tools tab then click Misc. to the left. Step 4 Under the UPnP Settings section, select Enabled using the radio buttons to enable UPnP on the wireless router, or select Disabled using the radio buttons to disable it. Step 5 Click Apply and then click Continue to save the new settings.

Step 1 Open your web browser and type the IP address of the wireless router in the address bar (default is 192.168.0.1). Press Enter. Step 2 The default username is admin and the password is blank (nothing). Click OK. Step 3 Click on the Home tab then click LAN to the left. Step 4 Next to IP Address enter the new IP address. Next to Subnet Mask enter the correct subnet mask for the IP address entered. Enter a Local Domain Name if applicable. Step 5 Click Apply and then click Continue to save the settings.

Step 1 Open your web browser and type the IP address of the wireless router in the address bar (default is 192.168.0.1). Press Enter. Step 2 The default username is admin and the password is blank (nothing). Click OK. Step 3 Click on the Home tab then click LAN to the left. Step 4 Next to IP Address enter the new IP address. Next to Subnet Mask enter the correct subnet mask for the IP address entered. Enter a Local Domain Name if applicable. Step 5 Click Apply and then click Continue to save the settings.

You will need to get the IP address from your computer that you want to open ports to. Step 1 Open your web browser and enter the IP address of your D-Link router (192.168.0.1). Enter username (admin) and your password (blank by default). Step 2 Click on the Advanced tab at the top and then click Firewall on the left side. Step 3 Click on Enabled and type in a name for the new rule. Step 4 Choose WAN as the Source and enter a range of IP addresses out on the internet that you would like this rule applied to. If you would like this rule to allow all internet users to be able to access these ports, then put an Asterisk in the first box and leave the second box empty. Step 5 Select LAN as the Destination and enter the IP address of the computer on your local network that you want to allow the incoming service to. This will not work with a range of IP addresses. Step 6 Enter the port or range of ports that are required to be open for the incoming service. Step 7 Select Always for the Schedule or specify a range of Day and time that you would like this rule to be active. Step 8 Click Apply and then click Continue. Because our routers use NAT (Network Address Translation), you can only open a specific port to one computer at a time. For example: If you have 2 web servers on your network, you cannot open port 80 to both computers. You will need to configure 1 of the web servers to use port 81. Now you can open port 80 to the first computer and then open port 81 to the other computer.