[MINA 1.x] Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: edu/emory/mathcs/backport/java/util/concurrent/Executor

[Hieu Phan Thanh]

Hello,
I'm very confusing. The first time I try to run the application from
mina 0.8.x to 1.x. The exception below is occurred. 
Could you please help me to solve the problem? Thank you so much.

=====================================================================
Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError:
edu/emory/mathcs/backport/java/util/concurrent/Executor
        at
bc.manage.BcSessionManager.getSession(BcSessionManager.java:101)
        at
bc.manage.BcSessionManager.getConnection(BcSessionManager.java:88)
        at
bc.gui.BCSimulatorFrame$3.actionPerformed(BCSimulatorFrame.java:278)
        at javax.swing.AbstractButton.fireActionPerformed(Unknown
Source)
        at javax.swing.AbstractButton$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.AWTEventMulticaster.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.pumpOneEventForHierarchy(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)
=================================================================

Thanks & best regards,
Hieu Phan.