DynamicJasper - Erro com JavaWebStart

INFO: obtaining DynamicJasperDesign instance

net.sf.jasperreports.engine.JRException: Error saving expressions class file : C:\Program Files\Mozilla Firefox\DynamicReport_1279555248779_783288.java

at net.sf.jasperreports.engine.util.JRSaver.saveClassSource(JRSaver.java:171)

at net.sf.jasperreports.engine.design.JRAbstractCompiler.getSourceFile(JRAbstractCompiler.java:301)

at net.sf.jasperreports.engine.design.JRAbstractCompiler.createCompileUnit(JRAbstractCompiler.java:273)

at net.sf.jasperreports.engine.design.JRAbstractCompiler.compileReport(JRAbstractCompiler.java:168)

at net.sf.jasperreports.engine.JasperCompileManager.compileReport(JasperCompileManager.java:219)

at ar.com.fdvs.dj.core.DynamicJasperHelper.generateJasperReport(DynamicJasperHelper.java:523)

at ar.com.fdvs.dj.core.DynamicJasperHelper.generateJasperPrint(DynamicJasperHelper.java:283)

at ar.com.fdvs.dj.core.DynamicJasperHelper.generateJasperPrint(DynamicJasperHelper.java:236)

at br.com.gerenciacallcenter.view.AgenteGerencialForm.abreRelatorioDeProdutividade(AgenteGerencialForm.java:564)

at br.com.gerenciacallcenter.view.AgenteGerencialForm.btnRelatorioProdutividadeActionPerformed(AgenteGerencialForm.java:2117)

at br.com.gerenciacallcenter.view.AgenteGerencialForm.access$1900(AgenteGerencialForm.java:113)

at br.com.gerenciacallcenter.view.AgenteGerencialForm$14.actionPerformed(AgenteGerencialForm.java:1372)

at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)

at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)

at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)

at javax.swing.DefaultButtonModel.setPressed(Unknown Source)

at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)

at java.awt.Component.processMouseEvent(Unknown Source)

at javax.swing.JComponent.processMouseEvent(Unknown Source)

at java.awt.Component.processEvent(Unknown Source)

at java.awt.Container.processEvent(Unknown Source)

at java.awt.Component.dispatchEventImpl(Unknown Source)

at java.awt.Container.dispatchEventImpl(Unknown Source)

at java.awt.Component.dispatchEvent(Unknown Source)

at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)

at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)

at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)

at java.awt.Container.dispatchEventImpl(Unknown Source)

at java.awt.Window.dispatchEventImpl(Unknown Source)

at java.awt.Component.dispatchEvent(Unknown Source)

at java.awt.EventQueue.dispatchEvent(Unknown Source)

at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)

at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)

at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)

at java.awt.EventDispatchThread.pumpEvents(Unknown Source)

at java.awt.EventDispatchThread.pumpEvents(Unknown Source)

at java.awt.EventDispatchThread.run(Unknown Source)

Caused by: java.io.FileNotFoundException: C:\Program Files\Mozilla Firefox\DynamicReport_1279555248779_783288.java (Acesso negado)

at java.io.FileOutputStream.open(Native Method)

at java.io.FileOutputStream.(Unknown Source)

at java.io.FileOutputStream.(Unknown Source)

at java.io.FileWriter.(Unknown Source)

at net.sf.jasperreports.engine.util.JRSaver.saveClassSource(JRSaver.java:163)

… 36 more