Actually It is working. But not the way I want it. I've installed bluez and stuff, I've wrote some lines at /etc/asound.conf and I'm able to hear from it while I type something like this:
mplayer -ao alsa:device=bluetooth <filename>
I could also configure it at Skype, but the microphone not seems to be working.
Despite I've used kde interface to sync and connect the headset (nokia bh-503), I can't find it at multimidia center (just bluetooth), neither I can configure it at any other place to turn my default audio device. The only way I could use it till now was the command line above and skype.
I think it is more an alsa or kde configuration problem than a bluetooth properly. Here is my asound.conf,