cannot help me?

when I plug the headsets, they are not recgnized under LXDE!!!!

the sistems goes via speaker as if I've never plugged the headsets!!!

or better, If I start lxde with eadsets plugged, the system remains "Plugged" evenif I unplug them (so speakers does not work) and the viceversa, If i start without, the eadsets will not work!!!
help!!!!