Jnlp

[actitud]

Hola a todos tengo una aplicación Jnlp, la cual la se ha firmado; pero me lanza el siguiente error.....

java.security.AccessControlException: access denied (java.util.PropertyPermission user.dir read)
at java.security.AccessControlContext.checkPermission (Unknown Source)
at java.security.AccessController.checkPermission(Unk nown Source)
at java.lang.SecurityManager.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkPropertyAccess(Unkn own Source)
at java.lang.System.getProperty(Unknown Source)
at java.io.Win32FileSystem.getUserPath(Unknown Source)
at java.io.Win32FileSystem.resolve(Unknown Source)
at java.io.File.getAbsolutePath(Unknown Source)
at sun.awt.shell.Win32ShellFolder2.<init>(Unknown Source)
at sun.awt.shell.Win32ShellFolder2.listFiles(Unknown Source)
at sun.awt.shell.ShellFolder.listFiles(Unknown Source)
at sun.awt.shell.Win32ShellFolderManager2.get(Unknown Source)
at sun.awt.shell.ShellFolder.get(Unknown Source)
at javax.swing.plaf.metal.MetalFileChooserUI.updateUs eShellFolder(Unknown Source)
at javax.swing.plaf.metal.MetalFileChooserUI.installC omponents(Unknown Source)
at javax.swing.plaf.basic.BasicFileChooserUI.installU I(Unknown Source)
at javax.swing.plaf.metal.MetalFileChooserUI.installU I(Unknown Source)
at javax.swing.JComponent.setUI(Unknown Source)
at javax.swing.JFileChooser.updateUI(Unknown Source)
at javax.swing.JFileChooser.setup(Unknown Source)
at javax.swing.JFileChooser.<init>(Unknown Source)
at javax.swing.JFileChooser.<init>(Unknown Source)
at Procesa.JNLPFileChooser.initComponents(JNLPFileCho oser.java:31)
at Procesa.JNLPFileChooser.<init>(JNLPFileChooser.jav a:20)
at Procesa.JNLPFileChooser$2.run(JNLPFileChooser.java :95)
at java.security.AccessController.doPrivileged(Native Method)
at Procesa.JNLPFileChooser.main(JNLPFileChooser.java: 92)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ e Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknow n Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Un known Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.sun.javaws.Launcher.executeApplication(Unknown Source)
at com.sun.javaws.Launcher.executeMainClass(Unknown Source)
at com.sun.javaws.Launcher.doLaunchApp(Unknown Source)
at com.sun.javaws.Launcher.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

no se que pueda faltar, si alguien pudiera orientarme, se lo agradesco de antemano