ctrl alt backspace does not exit X server

[Edward Martinez]

    Hi,
        
           I just  finished  installing X org from pkgsrc like the
        handbook describes, everything went well, except,  when i press
        "ctrl +alt+ backspace simultaneously
        to exit x windows, it does not exit, like it describes in the
        handbook to exit x.   I don't know if i
        left something out or I have to add something to xorg.conf. 
      
         
        
        Regards 
        Edward