Phill,poochi ,unicman..help needed in exception..

i have a joptionpane that comes on a click of a button over a jtextarea.
when i click on the optionpane with a mouse it throws an exception like this..Exception occurred during event dispatching:java.lang.NullPointerException: null pData at sun.awt.windows.WInputMethod.handleNativeIMEEvent(Native Method) at sun.awt.windows.WInputMethod.dispatchEvent(WInputMethod.java:256) at sun.awt.im.InputContext.dispatchEvent(InputContext.java:173) at sun.awt.im.InputMethodContext.dispatchEvent(InputMethodContext.java:180) at java.awt.Component.dispatchEventImpl(Component.java:2473) at java.awt.Container.dispatchEventImpl(Container.java:1302) at java.awt.Component.dispatchEvent(Component.java:2443) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:2504) at java.awt.LightweightDispatcher.trackMouseEnterExit(Container.java:2366) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:2261) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:2191) at java.awt.Container.dispatchEventImpl(Container.java:1289) at java.awt.Window.dispatchEventImpl(Window.java:854) at java.awt.Component.dispatchEvent(Component.java:2443) at java.awt.EventQueue.dispatchEvent(EventQueue.java:302) at java.awt.EventDispatchThread.pumpOneEvent(EventDispatchThread.java:105) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:95) at
java.awt.EventDispatchThread.run(EventDispatchThread.java:86)



but,when i use the tab key move the focus to the button in the optionpane and use the spacebar in the keyboard to click the button, it works fine.

please help me. i have a mouselistener on the textarea..