Thx!! No my network card is working well. When restarting the system the led of the wlan card was on and it seemed to be ok.
Eh... I know that this topic wasn't primarily created for troubleshooting but I cannot bring it on. I used this tutorial:
It should work now ok but it doesn't. I use network manager-gnome package to get the interfaes working but I cannot see it. Is it possible that the nediswrapper or bcmwl kernel modul is in blacklist or something? What shall I do now that my hardware is working with my system I just cannot configure it?