에러메시지 입니다

[hero4638]

swt파일도 lib에 넣어줬는데도 상대방에게 메시지를 받으면
아래와 같은 에러가 발생하는군요
java버전도 1.5 이상입니다.

파이어폭스를 뛰워놓았는데 그거때문인가요? 흑;;

수고하세요 존 프로그램 개발해주셔서 감사합니다 ^^
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org.eclipse.swt.SWTException: Widget is disposed
at org.eclipse.swt.SWT.error(SWT.java:3499)
at org.eclipse.swt.SWT.error(SWT.java:3422)
at org.eclipse.swt.SWT.error(SWT.java:3393)
at org.eclipse.swt.widgets.Widget.error(Widget.java:438)
at org.eclipse.swt.widgets.Widget.checkWidget(Widget.java:376)
at org.eclipse.swt.widgets.Label.setText(Label.java:554)
at kfmes.jateon.A.G.A(Unknown Source)
at kfmes.jateon.C$_B$2.run(Unknown Source)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:123)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3233)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2926)
at kfmes.jateon.E.N(Unknown Source)
at kfmes.jateon.E.<init>(Unknown Source)
at kfmes.jateon.Main.A(Unknown Source)
at kfmes.jateon.Main.main(Unknown Source)
java.lang.NullPointerException
at kfmes.jateon.Main.A(Unknown Source)
at kfmes.jateon.Main.main(Unknown Source)

Error - Can't run this program.
Check Your System
JRE(Java Runtime Environment) version 1.4 or higher.
GUI interface (Linux X-Window, M$-Windows, etc...)
For bug reporting instructions, please see:
<URL:http://jateon.kfmes.com>.