error in gsseditor.

GssEditor in my isaviz 2.0 installation don't work. If I click edit stylesheet in stylesheet tab of the definition windows nothing happen.
Gssedit.bat go in error:


C:\IsaViz>java.exe -classpath lib\isaviz.jar;lib\zvtm.jar;lib\jena.jar;lib\xerce
sImpl.jar;lib\xmlParserAPIs.jar;lib\icu4j.jar;lib\antlr.debug.jar;lib\junit.jar;
lib\log4j-1.2.7.jar;lib\jakarta-oro-2.0.5.jar org.w3c.IsaViz.GSSEditor
Exception in thread "main" java.lang.NoClassDefFoundError: javax/swing/SpinnerMo
del
        at org.w3c.IsaViz.GSSEditor.<clinit>(GSSEditor.java:126)

I need a little help.

Sorry for my english.

Nicola