[JAVA3D] I can't run demo under Java 3D 1.3

[Greg Huang]

hi I installed sdk1.4.1 + java3d openGL 1.3 in my computer, but I can't run any demo program now. When I executed the program, I get the followed message what is the cause of it ? thanks in advance!   p.s I can run it under java3d 1.2    C:\jdk1.4.1\demo\java3d\HelloUniverse>java HelloUniverse ************************************************************************ *** ERROR: Canvas3D constructed with a null GraphicsConfiguration *** This will cause a NullPointerException in a subsequent release ************************************************************************ java.lang.NullPointerException: Canvas3D: null GraphicsConfiguration         at javax.media.j3d.Canvas3D.<init>(Canvas3D.java:1093)         at javax.media.j3d.Canvas3D.<init>(Canvas3D.java:1058)         at HelloUniverse.init(HelloUniverse.java:97)         at com.sun.j3d.utils.applet.MainFrame.run(MainFrame.java:262)         at java.lang.Thread.run(Thread.java:536)