health care.gov. we are hearing more this morning about just what the administration was told about potential problems with this site way in advance. cnn's brian todd has that. >> reporter: luke chung operates a database company in northern virginia. he's an expert on heavily trafficked web sites but even he is frustrated navigating health care.gov. >> this is interesting. >> reporter: what do you got? >> i don't know what i had. i just tried to log into my account that i have already established. >> reporter: and? >> and it says unexpected error. >> reporter: since the rollout last week chung is only trying to get quote on prices and not even to enroll. error messages and booted out of the system and other problems have exasperated hundreds of thousands.