I would like to apologize for sending this for the hole list, but I did
not find another way to get help!
  I subscribed to this list months ago. Now, I need to unsubscribe. I
tryed the command unsubscribe to the listserver and got a strange messa-
ge saying that I could not act in behalf of my address. I wonder: If I
could subscribe, why can't I unsubscribe now?
  Does someone have any key for the exit door?
  Thank you,
             Fernando