Java problem; can I go back to old version? Thread.run; red x

Hi
I have a Minolta 2001 - copymachine which I can handle over Browser and java.
I can see the copymachine and theDetails; i cannot use the Java based WebTools
I have 2 mac iMac G5 with 10.4.8 and MacBook intel 10.4.8
till 10.3.x on my iMac G5 everything is fine
later - in the Tigerversion - or 10.3.9 ?
I got following messages in the log - Macbook never worked
basic: Ausnahme: java.lang.NoClassDefFoundError: com/efi/utils/chooser/ChooserHolder
java.lang.NoClassDefFoundError: com/efi/utils/chooser/ChooserHolder
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
at sun.applet.AppletClassLoader.findClass(AppletClassLoader.java:163)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.applet.AppletClassLoader.loadClass(AppletClassLoader.java:119)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2328)
at java.lang.Class.getConstructor0(Class.java:2640)
at java.lang.Class.newInstance0(Class.java:321)
at java.lang.Class.newInstance(Class.java:303)
at sun.applet.AppletPanel.createApplet(AppletPanel.java:721)
at sun.plugin.AppletViewer.createApplet(AppletViewer.java:1807)
at sun.applet.AppletPanel.runLoader(AppletPanel.java:650)
at sun.applet.AppletPanel.run(AppletPanel.java:324)
at java.lang.Thread.run(Thread.java:613)
the panell have a red X and do not bring the menu für the webtools
I can see the copymachine, and see how are the details;
but I cannot use the javadriven WebTools
everything is fine working with OS 10.3.x
I had the same troubles with my PC XP Laptop.
There I can solve the problem:
I delete Java, InternetExplorer
install InternetExplorer new -
and with the explorer th old Java
BINGO all things are working!
Perhaps anyone of you can help me ?
I checked
Version of Java - I have the latest
I reset Java
I reset Safari
I also change my network - I put the router away - only switch in the network - did not work
nothing worked
hope any of you have a solution.
THNX in advance for every answer
even if you think its stupid
MacBook, iMac 20   Mac OS X (10.4.8)  

I'm sorry, but Apple does not provide a downgrade path for iOS. Because downgrading is unsupported by Apple we cannot discuss it on these forums, but you can use Google to find information on how to install an older version of iOS on any iDevice.

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