No "Enable Mobile Broadband" option

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http://askubuntu.com – When i installing ubuntu 11.10 using live CD, i can see "enable mobile broadband" option, then i check it and setting up the dial up configuration. And then i connected to the internet while the installation is on the progress. But ! when the installation finish and requiring a reboot. I reboot, and then the "enable mobile broadband" option is not listed. i type ifconfig n i see there is eth0 wlan0 and wwan0. what is the problem is ? i can't connect to internet anymore. (HowTos)