cannot run xxe

[mergan]

Hello,

Installed  xxe on a Sun Ultra5, running on Solaris 2.6 .
Followed the instructions in the 'install' section .
When starting xxe, I receive the following error :

Exception in thread "main" java.lang.NoSuchMethodError
        at com.xmlmind.xmleditapp.App.configureViewport(App.java:335)
        at com.xmlmind.xmleditapp.App.<init>(App.java:220)
        at com.xmlmind.xmleditapp.App.main(App.java:176)

Any idea ?

Thanx in advance