数据库连接问题

大家好，这是自己以前参与做的项目，现在想再调试下，发现运行有问题，大家帮忙看看，这是什么问题  拜托了
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:582)
        at java.sql.DriverManager.getConnection(DriverManager.java:185)
        at assetapplication.AssetuDAO.getConn(AssetuDAO.java:609)
        at view.Login.validateUser(Login.java:36)
        at view.LoginIn.jButton1ActionPerformed(LoginIn.java:110)
        at view.LoginIn.access$000(LoginIn.java:17)
        at view.LoginIn$1.actionPerformed(LoginIn.java:50)
        at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
        at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
        at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
        at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
        at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
        at java.awt.Component.processMouseEvent(Component.java:6041)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3265)
        at java.awt.Component.processEvent(Component.java:5806)
        at java.awt.Container.processEvent(Container.java:2058)
        at java.awt.Component.dispatchEventImpl(Component.java:4413)
        at java.awt.Container.dispatchEventImpl(Container.java:2116)
        at java.awt.Component.dispatchEvent(Component.java:4243)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322)
        at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3986)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916)
        at java.awt.Container.dispatchEventImpl(Container.java:2102)
        at java.awt.Window.dispatchEventImpl(Window.java:2440)
        at java.awt.Component.dispatchEvent(Component.java:4243)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)