Cannot connect wirelessly, but can through my network cable

If you have a wireless router and it is connected to the DSLor cable modem then - To connect to your wireless router, the router needsits wireless settings to be configured with the SSID, encryption key etc., alsothe wireless cards in all the laptops/computers needs to be configured withthese router's wireless settings. Then the laptops/desktop computers cancommunicate with your wireless router and access the Internet via the DSL or cable modem.

Modem <-- Ethernet cable --> WAN port on router

LAN port #1 on router <--- Ethernet cable --> network-port on desktop computer

LAN port #2 on router <-- Ethernet cable --> network-port on laptop computer

If the router has built-in "wireless" capability, then use the desktop computer's connection to the router to "configure" the wireless adapter, i.e., pick an SSID, and establish a password, and then your laptop computer can use the SSID/password to connect "wirelessly" to the router.

If you connect the computer to the router with the cable , does it work?
If yes then the wired connection is working.

What is the Operating system on the laptop or the wireless computer ?

If it is XP then in the bottom right hand corner you will find Wireless network connection ( looks like 1 computer monitor). Use that icon to connect to the wireless network.
If it is windows Vista, then in the bottom right hand corner you will find 2 computer monitor icon. Use that icon to connect to the wireless network.
If it is Windows 98/ME/2000 then use the adapter utility to connect to the wireless network.
For MAC you will see the AIRPORT icon at the top.

Check the wireless settings of the router first . Make sure that you have all the wireless settings of the router. If you are not sure about the settings, then open the router set up and check the settings.

Click Here for step by step instructions on how to connect to the wireless network and troubleshooting steps

You want to secure the wireless network.
Is there any computer connected to the router with the Ethernet cable?
If not then you will need to connect the computer to the router with the cable.
Check the IP address on the computer. Open the router set up page.
Once you open the set up page, you will find the option to make it secured

Click Here for step by step instructions

If you connect the ethernet cable to the computer it works .

You will need to check the wireless settings of the router.
Also check the the wireless connection of your laptop.
To check the wireless settings of the router , you will need to open the router set up.

Click Here to know how to open the router set up.

are u getting all the lights on the router?if yes then connect the router with modem n if its wireless then turn off all three devices
then turn modem on first n wait till the lights on the modem get settelled,then turn the router back on n the computer,n check whether the computer is picking the wireless or not,if yes try the
internet.

try a cross cable between di-624 and westell dsl router.

try www.supportspace.com

100% free, but 100% qualfied experts to help you.

Start with the simplest answer first so make sure the laptop's WiFi is turned on. If you have set the router to provide a closed network your laptop will not see it automatically and you will need to enter the WiFi network settings in network setup. if you are using Windows click start, click control panel and click network, on the left hand sidebar you will see "Setup a Small or Home Office Network", follow the wizard and you should be able to get connected. If you are using Mac OS X click the Airport icon on your menu bar, click "other network" and enter the SSID, select the encryption type and enter the network key (password). Lastly make sure that if you have chosen to use an access control list you have entered and allowed your laptop's MAC address in the list before trying to connect.

This is unusual, as it seems the router is allocating two pc's the same IP address. Go into your routers settings (internet browser and type the router address, eg 192.168.1.1)' and look at Client DHCP list and look at the IP addresses that each pc has been given and see if two are the same, they should be one digit difference, that being the last. Also go into the properties of both your pc's wireless cards and ensure that they are set to obtain an ip address automatically.