I cannot connect to the internet but network is working...

The encryption code is in your router's wireless setup.
To connect your computer to a wireless router, you click the Refresh network list, then Choose your wireless network and then click Connect to your secured Wireless Network, it will asks for a Network Key before allowing you to connect into your wireless network. This Network Key is either the WEP, or WPA or WPA2 Encryption key that is configured in the Wireless settings in the Router. The Passphrase is an alternate way to setup the Encryption key.
When you are requested for a Network Key, you can just enter the Passphrase or WPA or WPA2 key that was used to configure the Encryption key in the wireless router. http://www.fixya.com/support/r5270415-network_password_network_address For information on securing your wireless network, configuring the wireless router and configuring the wireless card in the laptop/computer, please click on this link and follow my instructions :- http://www.fixya.com/support/r3559128-wireless_router_security

The router's password is a Passphrase or the WEP or WPA orWPA2 encryption key. The Passphrase generates the WEP or WPA or WPA2 encryptionkey and this is in the router's wireless settings. To connect to your wireless router, it needs the router'swireless settings configured ie SSID, WPA or WPA2 encryption key and also thewireless cards in all the laptops and or computers needs to be configured withthese router's wireless settings. Then the laptops and desktop computers cancommunicate with your wireless router.

To connect to your wireless router, it needs the router's wireless settings configured and also the wireless cards in all the laptops and or computers needs to be configured with the router's wireless settings. Then the laptops and desktop computers can communicate with your wireless router.

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

You'll want to configure your router as a dhcp server. Connect the switch to your router's lan port. Connect the remaining devices to a port on the switch. Your wireless access point should have it's dhcp server disabled. You can only have one dhcp server per network. The wireless can get it's address from the router's dhcp and the wireless client devices will get their ip address from the router, as well. If your wireless access point is a router with a wan/broadband port and some switch ports you will want to make sure that you are connecting to your Asus switch via one of the switch ports.
Be sure that your client devices are configured to get their ip address via dhcp and you should be surfing the interweb in no time flat.

To use a wireless network/connection you need to do.
1. Configure the router's wireless with SSID, WPA encryption etc.
2. Next configure the wireless card in the computer/laptop with the router's wireless settings so it can connect to the wireless router.
Please click on this link for my instructions on how to secure your wireless network, configure the wireless router and configure the wireless card in the computer/laptop :-

http://www.fixya.com/support/r3559128-wireless_router_security

what is the wan IP in your modem?
What is your DNS configuration?
Cna you successfully run the following command from a command prompt?
nslookup google.com
Does it resolve the hostname to an ip address?

Youe broadband router is working ok with the broadband cable.So it is configured with the broadband cable.Now,to work with the wireless internet,you have to configured the wi-fi router to work internet.You can see the wi-fi connection but unless & untill you will configure wi-fi router it must not work or if before it was working with the wi-fi then you can check the wi-fi router setting because it might change by mistake.Surely it will work after configurating wi-fi router.

on the asus in the tool bar right click the wireless icon then choose view wireless a netwrok should appear then choose connect
if no networks appear on same page click to refresh network list once you have a network then click to connect.
I think the problem is diue to interference as you said you live in an apartment.
You can get a better router system or have someone come in and configure the one you have and make it a secure connection with password

Just first install the wireless card to your computer then when its already properly installed , connect to the wireless network name of your router and when its say connected try the internet that should e working fine already..........

This would most likely happen if your router is not configured to connect to the modem correctly. You said that you can connect to the router locally that means there is already a connection. The problem would be the routers configuration to the internet.