求教为什么连接数据库老是失败

lConnection { public static final String DRIVER = "com.microsoft.sqlserver.jdbc.SQLServerDriver"; public static final String URL = "jdbc:sqlserver://192.168.10.100\\SQL2000;databaseName=Address"; public static final String USER = "sa"; public static final String PASS_WORD = ""; public SqlConnection() { try { Class.forName(DRIVER); // 获取数据库连接的第一步，加载驱动类 } catch (ClassNotFoundException e) { System.out.printf("程序发生异常：%s%n", e); } } public Connection getConnection() { Connection connection = null; try { // 获取数据库连接的第二步，通过java.sql.DriverManager.getConnection()方法获取数据库连接 connection = DriverManager.getConnection(URL, USER, PASS_WORD); } catch (SQLException e) { System.out.printf("程序发生异常：%s%n", e); } return con