用sqlserver2000连数据库tomcat报库中对象错！

java.sql.SQLException: 对象名 'subject' 无效。
at net.sourceforge.jtds.jdbc.SQLDiagnostic.addDiagnostic(SQLDiagnostic.java:364)
at net.sourceforge.jtds.jdbc.TdsCore.tdsErrorToken(TdsCore.java:2754)
at net.sourceforge.jtds.jdbc.TdsCore.nextToken(TdsCore.java:2195)
at net.sourceforge.jtds.jdbc.TdsCore.getMoreResults(TdsCore.java:620)
at net.sourceforge.jtds.jdbc.JtdsStatement.executeSQLQuery(JtdsStatement.java:372)
at net.sourceforge.jtds.jdbc.JtdsStatement.executeQuery(JtdsStatement.java:1176)
at util.DBConnect.executeQuery(DBConnect.java:122)
at bean.FirstPage.getMessage(FirstPage.java:25)
at com.struts.action.FirstPageAction.execute(FirstPageAction.java:50)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:743)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:284)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:204)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:742)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:506)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:443)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:359)
at org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:543)
at org.apache.struts.taglib.logic.ForwardTag.doForward(ForwardTag.java:121)
at org.apache.struts.taglib.logic.ForwardTag.doEndTag(ForwardTag.java:105)
at org.apache.jsp.index_jsp._jspx_meth_logic_forward_0(index_jsp.java:115)
at org.apache.jsp.index_jsp._jspx_meth_html_html_0(index_jsp.java:91)
at org.apache.jsp.index_jsp._jspService(index_jsp.java:59)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:133)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:311)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:284)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:204)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:563)
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:245)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:199)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:563)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:195)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:164)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:149)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:563)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:156)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:151)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:563)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:972)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:209)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:670)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:517)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:575)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:666)
at java.lang.Thread.run(Thread.java:595)
上面的对象名‘subject’是数据库中一个表名，我的sql语句是正确的，搞了一晚上了，求高手指点！谢谢！