系统 xp
数据库 sql server 2000 已经打上了sp4补丁
错误提示
java.sql.SQLException: [Microsoft][SQLServer 2000 Driver for JDBC]Error establishing socket.
at com.microsoft.jdbc.base.BaseExceptions.createException(Unknown Source)
at com.microsoft.jdbc.base.BaseExceptions.getException(Unknown Source)
at com.microsoft.jdbc.base.BaseExceptions.getException(Unknown Source)
at com.microsoft.jdbc.sqlserver.tds.TDSConnection.<init>(Unknown Source)
at com.microsoft.jdbc.sqlserver.SQLServerImplConnection.open(Unknown Source)
at com.microsoft.jdbc.base.BaseConnection.getNewImplConnection(Unknown Source)
at com.microsoft.jdbc.base.BaseConnection.open(Unknown Source)
at com.microsoft.jdbc.base.BaseDriver.connect(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)

代码
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
System.out.println("驱动程序已加载");
conn=DriverManager.getConnection("jdbc:microsoft:sqlserver://127.0.0.1:1433;DatabaseName=sheji_data","sa","admin");
System.out.println("OK,成功连接到数据库");

执行过程中可以看到"驱动程序已加载"然后就是
java.sql.SQLException: [Microsoft][SQLServer 2000 Driver for JDBC]Error establishing socket.

在网上查的资料说打上补丁就行了,可是不知道为什么我这里还是出错
请个位高手帮帮忙
谢谢