ZK - Open Source Ajax Java Framework

Hello,
when i update the zk jar s i get this error in firebug when i call some of my zul pages:

this._end is undefined
[Break on this error] ;zk._m['default']=[zk._p.p.Timebox,'ro...p.silent)){a(E,p&&p.timeout)}}})})();  zul.db.wpd (line 6)

zk jar s:
zcommon.jar
zcommons-el.jar
zhtml.jar
zk.jar
zkex.jar
zkmax.jar
zkplus.jar
zml.jar
zul.jar (in this jar i have changed only images to style my application.)
zweb.jar

should somebody please tell me if i have something forgotten to update or has anybody an idea what should be wrong. in zk 5.0.4 it works fine.

has nobody an idea? please help

Hi
You can try to use zk studio to build a new zk project
and refer the list of jar in the lib folder