Help!!! problem with ImageIcon!!!

I use ImageIcon in Local's APP no problem,

image1 = new ImageIcon(cnopensource.MainFrame.class.getResource("Open24.gif"));

I make this APP into a jar for jws.

when it excute at the client, The jws console print

ava.lang.NullPointerException

at javax.swing.ImageIcon.<init>(ImageIcon.java:134)

at cnopensource.MainFrame.jbInit(MainFrame.java:108)

at cnopensource.MainFrame.<init>(MainFrame.java:99)

.......................

the "MainFrame.java:108" is

image1 = new ImageIcon(cnopensource.MainFrame.class.getResource("Open24.gif"));

everyone tell me why? How to slove this problem?

I apologized for my limited English.

[724 byte] By [wflm] at [2007-9-26 2:12:18]