A 19-year-old Urbana man is still missing and his mother is calling on the public to help.  Montell Aker went missing six weeks ago on August 13th.  He left home to go to the post office that morning but never returned.  His mother Lavon says there were no pressing issues going on at home and according to authorities, Aker has no criminal background.  They say he left with no car, no money and no extra clothes.  Anyone with information is asked to call Urbana police at 384-2320.