Unfortunately, it does't work.
The KDE 4.2. won't allow me to right click on the knetworkmanager when i start it from console. KDE 3.5' starts knetworkmanager and even discovers correctly all the networks. However when I try to connect it says "Connection Failure Could not connect to the network using device eth0". And if I try to connect to the wireless, it simply try for a while and then stops. Now is a good time for help, because I'm without working net and this is very bad.
Update: I decided to roll back to the 7.0. version, because it was the only working one. Wired network is better than no network at all