Open internet explorer (or firefox) and type 192.168.2.1 in the address bar and press enter
On the router interface, click Security, choose one of the necessary options from the drop down menu. If all the potential network users hardware including the router can support WPA2-Personal, then do so. If not, (which may be the case in some older network adaptors), use straight forward WPA-PSK (TKIP)or at very least 128bit WEP
Type in a passkey, which must be at least 8 characters long.
Click Submit changes
Now in Vista Click Start | Control Panel Click Network and Internet Go to Network and sharing center Then go to manage wireless connection Right-click on the SSID, and then select Properties. Under the Security Tab, set Security Type to WPA2-Personal, Set Encryption Type to NONE. (Or you may select AES if its selected as TKIP or vice versa) Set Passphrase. Click on OK. Then try to check your connection
-------------------- "Only the stupid don't ask questions." My piccies