See com.borland.dx.dataset.DataSetException error code:  BASE+66

com.borland.dx.dataset.DataSetException: [Microsoft][SQLServer 2000 Driver for JDBC]Error establishing socket.

at com.borland.dx.dataset.DataSetException.a(Unknown Source)

at com.borland.dx.dataset.DataSetException.throwException(Unknown Source)

at com.borland.dx.dataset.DataSetException.SQLException(Unknown Source)

at com.borland.dx.sql.dataset.Database.openConnection(Unknown Source)

at com.borland.jdbcx.metadata.DatabaseInfo.openConnection(Unknown Source)

at com.borland.jdbcx.metadata.e.run(Unknown Source)

Chained exception:

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(DriverManager.java:512)

at java.sql.DriverManager.getConnection(DriverManager.java:171)

at com.borland.dx.sql.dataset.Database.openConnection(Unknown Source)

at com.borland.jdbcx.metadata.DatabaseInfo.openConnection(Unknown Source)

at com.borland.jdbcx.metadata.e.run(Unknown Source)

是什么原因啊？