Admin Login Problem

[edmondwch]

I have changed my login name and password for the admin panel,

(original is "admin@localhost" & "admin", then I changed to "abc" & "abc"

after that I have received the email where subject is "Personal Information Change"

 

and now the problem happens

 

when i go back to the admin panel

(e.g. http://www.abc.com/admin/login.php)

the login page will load so I enter my login name and password, then it shows:

 

"HTTP 404 page cannot be found"

 

then I type

"http://www.abc.com/admin/index.php"

 

it will then turn to

"http://www.abc.com/admin/forbiden.php"

and shows

 

"Access Denied

 

No Right Permission Access

Please contact your Web Administrator to request

more access or if you found any problem."

 

Yet I can manage all the data in the admin panel.....

 

just don't know why, though I can control the admin panel, I just wonder why this happens?

Any one can give me some advice? Thx!