[Exception when export report to xls]

Hi colleages,

I have error when save report to xls and show the below exception

Exception in thread "AWT-EventQueue-0" java.lang.NoSuchMethodError: org.apache.poi.hssf.usermodel.HSSFWorkbook.getCreationHelper()Lorg/apache/poi/hssf/usermodel/HSSFCreationHelper;    at net.sf.jasperreports.engine.export.JRXlsExporter.openWorkbook(JRXlsExporter.java:327)    at net.sf.jasperreports.engine.export.JRXlsAbstractExporter.exportReportToStream(JRXlsAbstractExporter.java:765)    at net.sf.jasperreports.engine.export.JRXlsAbstractExporter.exportReport(JRXlsAbstractExporter.java:687)    at net.sf.jasperreports.view.save.JRSingleSheetXlsSaveContributor.save(JRSingleSheetXlsSaveContributor.java:117)    at net.sf.jasperreports.swing.JRViewerToolbar.btnSaveActionPerformed(JRViewerToolbar.java:421)    at net.sf.jasperreports.swing.JRViewerToolbar$1.actionPerformed(JRViewerToolbar.java:137)    at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)    at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)    at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)    at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)    at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)    at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:289)    at java.awt.Component.processMouseEvent(Component.java:6533)    at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)    at java.awt.Component.processEvent(Component.java:6298)    at java.awt.Container.processEvent(Container.java:2236)    at java.awt.Component.dispatchEventImpl(Component.java:4889)    at java.awt.Container.dispatchEventImpl(Container.java:2294)    at java.awt.Component.dispatchEvent(Component.java:4711)    at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)    at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525)    at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)    at java.awt.Container.dispatchEventImpl(Container.java:2280)    at java.awt.Window.dispatchEventImpl(Window.java:2746)    at java.awt.Component.dispatchEvent(Component.java:4711)    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)    at java.awt.EventQueue.access$500(EventQueue.java:97)    at java.awt.EventQueue$3.run(EventQueue.java:709)    at java.awt.EventQueue$3.run(EventQueue.java:703)    at java.security.AccessController.doPrivileged(Native Method)    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)    at java.awt.EventQueue$4.run(EventQueue.java:731)    at java.awt.EventQueue$4.run(EventQueue.java:729)    at java.security.AccessController.doPrivileged(Native Method)    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)    at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)    at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)[/code]

I need your help plz