LaTeXTools 0.5.7 cannot load in Jedit 4.3pre16, Sun Java 1.6.0_10, Ubuntu 8.10 64-bit

java.lang.NoClassDefFoundError: gnu/regexp/REException
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
at java.lang.Class.getConstructors(Class.java:1459)
at org.gjt.sp.jedit.bsh.Reflect.constructObject(Reflect.java:603)
at org.gjt.sp.jedit.bsh.BSHAllocationExpression.constructObject(BSHAllocationExpression.java:123)
at org.gjt.sp.jedit.bsh.BSHAllocationExpression.objectAllocation(BSHAllocationExpression.java:114)
at org.gjt.sp.jedit.bsh.BSHAllocationExpression.eval(BSHAllocationExpression.java:62)
at org.gjt.sp.jedit.bsh.BSHPrimaryExpression.eval(BSHPrimaryExpression.java:102)
at org.gjt.sp.jedit.bsh.BSHPrimaryExpression.eval(BSHPrimaryExpression.java:47)
at org.gjt.sp.jedit.bsh.Interpreter.eval(Interpreter.java:644)
at org.gjt.sp.jedit.bsh.Interpreter.eval(Interpreter.java:738)
at org.gjt.sp.jedit.bsh.Interpreter.eval(Interpreter.java:727)
at org.gjt.sp.jedit.BeanShellFacade._eval(BeanShellFacade.java:148)
at org.gjt.sp.jedit.BeanShellFacade.eval(BeanShellFacade.java:113)
at org.gjt.sp.jedit.BeanShell.eval(BeanShell.java:387)
at org.gjt.sp.jedit.ServiceManager$Descriptor.getInstance(ServiceManager.java:295)
at org.gjt.sp.jedit.ServiceManager.getService(ServiceManager.java:238)
at sidekick.SideKickPlugin.getParser(Unknown Source)
at sidekick.SideKickPlugin.setParserForBuffer(Unknown Source)
at sidekick.SideKickTree$ActionHandler.actionPerformed(Unknown Source)
at javax.swing.JComboBox.fireActionEvent(JComboBox.java:1240)
at javax.swing.JComboBox.setSelectedItem(JComboBox.java:567)
at javax.swing.JComboBox.setSelectedIndex(JComboBox.java:603)
at javax.swing.plaf.basic.BasicComboPopup$Handler.mouseReleased(BasicComboPopup.java:816)
at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:273)
at java.awt.Component.processMouseEvent(Component.java:6134)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3265)
at javax.swing.plaf.basic.BasicComboPopup$1.processMouseEvent(BasicComboPopup.java:480)
at java.awt.Component.processEvent(Component.java:5899)
at java.awt.Container.processEvent(Container.java:2023)
at java.awt.Component.dispatchEventImpl(Component.java:4501)
at java.awt.Container.dispatchEventImpl(Container.java:2081)
at java.awt.Component.dispatchEvent(Component.java:4331)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4301)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3965)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3895)
at java.awt.Container.dispatchEventImpl(Container.java:2067)
at java.awt.Window.dispatchEventImpl(Window.java:2458)
at java.awt.Component.dispatchEvent(Component.java:4331)
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)
Caused by: java.lang.ClassNotFoundException: gnu.regexp.REException
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at org.gjt.sp.jedit.JARClassLoader.loadFromParent(JARClassLoader.java:469)
at org.gjt.sp.jedit.JARClassLoader.loadClass(JARClassLoader.java:86)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
... 46 more