Cisco: User access from HTTP

When I try to configure the web access to my catalyst 2970 switch. After googling, I found the clue from here. I have to change the authentication method of the switch first, below is the step I use when connected to my switch using serial connection.

#enable
#config terminal
(config)#aaa new-model
(config)#aaa authentication login default local
(config)#aaa authorization exec local
(config)#username one privilege 15 password one
(config)#username three password three
(config)#username four privilege 7 password four
(config)#ip http server
(config)#ip http authentication aaa(config)#end
#end

and then I try to connect it through web.. and walaaa... :)