Unable to connect wirelessly

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http://askubuntu.com – I have a Dell d630 with a bcm4311 wireless card. I entered the SSID and mac address of the at&t router and the password and no connection. It doesn't even see the network.From network connections I choose "add" and it wants to add a VPN connection. How can I make the card active and connect to the Internet. (HowTos)