If no user account exists in a database for a specific login, the user that is using that login cannot access the database even though the user may be able to connect to the SQL server server.

如果数据库中不存在针对特定登录的用户帐户，使用该登录的用户即使能够连接到SQL Server服务器，也无法访问数据库。

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For instance, a Rational Team Concert 1.0 or later client cannot connect to a Rational Team Concert 2.0 or later server, nor the reverse.

例如，Rational Team Concert 1.0或者后续的客户端版本不能连接至Rational Team Concert 2.0或者后续版本的服务器，反过来也不行。

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Cannot connect to the proxy server. Contact your network administrator.

无法连接到代理服务器。请与网络管理员联系。

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