i can't use usb modem for the internet on ubuntu14.04

[ivana]

I use the mobile internet from the modem zte mf667 that was working fine on previous versions on ubuntu(13.04, 13.10), now, when I upgraded to ubuntu 14.10, it doesn't work at all. It just opens the window where he demands my pin(from my card) and that's it, it can't connect!

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: unity 7.2.2+14.04.20140714-0ubuntu1.1
ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
Uname: Linux 3.13.0-32-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.3
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CurrentDesktop: Unity
Date: Wed Aug 6 18:11:15 2014
InstallationDate: Installed on 2013-09-25 (315 days ago)
InstallationMedia: This
SourcePackage: unity
UpgradeStatus: Upgraded to trusty on 2014-08-04 (1 days ago)