关于SQL 2000 JDBC连接报错的问题

系统:win2K + tomcat1.33 + jdk
已安装了SQL Server 2000 driver for JDBC，代码见http://www.csdn.net/expert/topic/545/545229.xml?temp=.8857691
环境没问题，用JDBC－ODBC桥连接数据库没问题，直接用JDBC连接时提示的错误如下：
java.lang.NoClassDefFoundError: com/microsoft/util/UtilDummyPrintWriter
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:130)
at howjsp.sql_1._jspService(sql_1.java:98)
at org.apache.jasper.runtime.HttpJspBase.service(Unknown Source)
at javax.servlet.http.HttpServlet.service(HttpServlet.java)
at org.apache.tomcat.facade.ServletHandler.doService(Unknown Source)
at org.apache.tomcat.core.Handler.invoke(Unknown Source)
at org.apache.tomcat.core.Handler.service(Unknown Source)
at org.apache.tomcat.facade.ServletHandler.service(Unknown Source)
at org.apache.tomcat.core.ContextManager.internalService(Unknown Source)
at org.apache.tomcat.core.ContextManager.service(Unknown Source)
at org.apache.tomcat.modules.server.Http10Interceptor.processConnection(Unknown Source)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(Unknown Source)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(Unknown Source)
at java.lang.Thread.run(Thread.java:536)