GridbusBroker

I am getting the following error messages while trying to run gridbus broker workbench user interface:

C:\gridbusbroker-3.1.0\bin>gbb.bat -g
Starting Gridbus Broker v.3.1.0 ...
java.lang.NullPointerException
at org.gridbus.broker.gui.view.BrokerConsole.initActions(BrokerConsole.j
ava:186)
at org.gridbus.broker.gui.view.BrokerConsole.init(BrokerConsole.java:94)

at org.gridbus.broker.gui.view.BrokerConsole.<init>(BrokerConsole.java:6
5)
at org.gridbus.broker.gui.view.BrokerConsole.main(BrokerConsole.java:307
)
at org.gridbus.broker.initializer.StartRun.StartGUI(StartRun.java:215)
at org.gridbus.broker.initializer.StartRun.start(StartRun.java:133)
at org.gridbus.broker.initializer.StartRun.main(StartRun.java:96)
java.lang.RuntimeException: Can;t start Gridbus Broker Workbench
at org.gridbus.broker.gui.view.BrokerConsole.<init>(BrokerConsole.java:6
8)
at org.gridbus.broker.gui.view.BrokerConsole.main(BrokerConsole.java:307
)
at org.gridbus.broker.initializer.StartRun.StartGUI(StartRun.java:215)
at org.gridbus.broker.initializer.StartRun.start(StartRun.java:133)
at org.gridbus.broker.initializer.StartRun.main(StartRun.java:96)