设置了“用户名”，但未提供密码。将“用户名”设置为“machine”、“ASPNET”或“SYSTEM”外的其他值时，必须设置密码。不会应用对“用户名”的更改。

The 'Username' was set but no password was supplied. You must set the password when changing the 'Username' to anything other than 'machine', 'ASPNET', or 'SYSTEM'. The changes to the Username will not be applied.