JPCSP r1511 doesn't work on linux 64bit

[WaKKa]

Hi all,
For start, I'm sorry if my english isn't very correct
Then, I've downloaded the r1511 for a Ubuntu 64bit. After I start JPCSP and in the terminal I read a lot of java exception:

Code:

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
        at jpcsp.GUI.UmdBrowser$MemStickTableModel.getRowCount(UmdBrowser.java:185)
        at javax.swing.JTable.getRowCount(JTable.java:2631)
        at jpcsp.GUI.UmdBrowser.<init>(UmdBrowser.java:288)
        at jpcsp.MainGUI.openUmdActionPerformed(MainGUI.java:927)
        at jpcsp.MainGUI.access$500(MainGUI.java:91)
        at jpcsp.MainGUI$6.actionPerformed(MainGUI.java:275)
        at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
        at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
        at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
        at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
        at javax.swing.AbstractButton.doClick(AbstractButton.java:357)
        at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1223)
        at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1264)
        at java.awt.Component.processMouseEvent(Component.java:6263)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
        at java.awt.Component.processEvent(Component.java:6028)
        at java.awt.Container.processEvent(Container.java:2041)
        at java.awt.Component.dispatchEventImpl(Component.java:4630)
        at java.awt.Container.dispatchEventImpl(Container.java:2099)
        at java.awt.Component.dispatchEvent(Component.java:4460)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4574)
        at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
        at java.awt.Container.dispatchEventImpl(Container.java:2085)
        at java.awt.Component.dispatchEvent(Component.java:4460)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

while the Windows version doesn't return any exception.
Then, with Win32 version r1511 Crisis core starts but it's very slow even if the game works.
Any suggestion for run the emulator on linux ubuntu? What is the last working version for 64bit for linux?
Thank you very much for all!