Mobile Not connecting To My Pc

GuyZ M NEW TO THIS FORM ND NEED UR HELP,ALL OF A SUDDEN MY MOBILE STOPED AND WHEN I REBOTED IT AND CONNECTED TO MY PC IT QAS NOT SHOWING.NO MTP NO FTP WHATEVER IT IS SAID.... NEITHER ON KIES.TRIED ON DIFFERENT SYSTEM ,REBOOTED TWICE BUT STILL NOTHING.
PLEASE HELP ME .