Re: Could not initialize class javax.swing.UIManager

Dear all,
sorry if I cross-posted this issue both on javafx and swing space,
cause I think it may interest to both...so cause I've not received any
reply on other one I try on this one, cause I think it depends most on
swing than javafx.
I'm newbie of java technology.
I need your help to solve my issue.
I developed a Java fx application and I run it with:

javafx -classpath application.jar application.Main

It works on every win 7 system.

On some xp system (not everyone, only some one) I got this exception:

java.lang.noclassdeffounderror: Could not initialize class
javax.swing.UIManager
at
programPackage.Main.javafx$run$(Main.fx:29)

line on which error appears is the following

for (info: LookAndFeelInfo in UIManager.getInstalledLookAndFeels()) {

,

from this code

// use NIMBUS look
    try {
        for (info: LookAndFeelInfo in
UIManager.getInstalledLookAndFeels()) {
            if ("Nimbus".equals(info.getName())) {
                UIManager.setLookAndFeel(info.getClassNam=

                break;
            }
        }
    } catch (cEx: Exception) {
        println(cEx.getMessage());
    }

Could you please help me??
I'm desperate...I can't reproduce error on each xp system, because on
most of them application works...only on some xp system it appears.
I tried to uninstall jre and install latest one and I also updated
graphic drivers to latest one.

I hope someone can help me...I can't solve it and I'm crazying.

Thanks in advance