WE have set up a site on production. When we go default web address, its NOT  working but when I go to secure site address, its coming up. When I go to default web address, its throwing me Authorization required error. I look into object level and field level secutiry everything...whatcould be it..Please help!!

WE have set up a site on production. When we go default web address, its NOT  working but when I go to secure site address, its coming up. When I go to default web address, its throwing me Authorization required error. I look into object level and field level secutiry everything...whatcould be it..Please help!!