I have a modem device called Huawei ETS2051 and the Network Connection Manger can't detect it, but when I use Gnome-PPP it work fine but the problem is when I use Gnome-PPP; apps like Ubuntu software Center Can't reconice that's Iam connecting to the Internet so the app is just act like it's offline while other apps like web browsers and IM's work good under Gnome-PPP. any way what I want is to have a Full Ubuntu experince by making The Network Connection Manger detect my ETS2051.

More information:
Gnome-PPP is a GUI for wvdial.
the ETS2051 modem use a serial USB port.
I have a Windows driver CD for the device.
I have also find This qustion about the software Center acting like it's offline around wvdial and there's this launchpad bug.
and am really insest to use Ubuntu Software Center so please no other software manger apps recomendation...