5/11/2011 1:45:58 AM
RE:Your login attempt was not successful. Please try again.
This message indicates that either user name or password is wrong. When install new fresh instance, user name is „administrator“ with blank password (just leave password textbox empty). I would recommend you not to change password in DB, but delete it instead. If the UserPassword column is empty for given user, you must be able to login via her user name. Or, you can use your e-mail address (Email column) and use „Forgotten password“ link, which is available on Examples / Web parts / Membership / Logon form page.