Maybe you are not connecting to yours but to another wireless network with the same SSID or "Station" name.
When you were setting up the router via 192.168.2.1 on your desktop, did you change the SSID from the default to one of your own choosing (do not use your postcode, address, etc)?
There are several security aspects which your Belkin has available, all of which are avilable from the configuration pages when you access 192.168.2.1 (make sure you do it on your wired desktop!).
a) Set up a unique SSID
To set a password, start with the router via 192.168.2.1 above.
b) Data Traffic Encryption protocol
Ideally all your wireless devices can cope with the WPA data traffic encryption protocol rather then WEP. Many handheld wireless games consoles do not.
Of course, you will need to select the protocol which all your wireless devices has.
c) Set your unique password (Passphrase) on the router.
1) On each of your wireless devices, setup security in a similar fashion
- enter your unique SSID
- select the common data encryption protocol
- enter you unique password
You’ve only mentioned your DELL laptop as a wireless device.
That can best be setup as above, using Windows Zero Configuration (WZC);
Start> Control Panel> Network Connections> Wireless Network connections
Hope that has helped a bit.