Bundle don´t start

Hi,
Can anywone tell me what´s wrong when I double-click on a Zenworks icon on the desktop and nothing happends .. it only says "Running". In the ZCC I get this messages:

An Unknown exception occurred trying to process task: System.NullReferenceException: Objektreferensen har inte angetts till en instans av ett objekt. vid Novell.Zenworks.AppModule.AppActionItem.IsAppADevi ceAssignedUserApp() vid Novell.Zenworks.AppModule.AppActionItem.GetStatus( ) vid Novell.Zenworks.A

Additional Information:
None
Severity:
Error
Date:
January 24, 2013 9:03:59 AM
Acknowledged Date:
None
Source:
/Devices/Workstations/nykv10681
Message ID:
BUNDLE.UnknownExceptionOccurred
Probable Cause URL:
None
Log ID:
86ca2b7817cc6ca67f860116353a33e0
Related Objects:
/Bundles/Launchers/Groupwise802

But it don´t happends every time we start the icon only sometimes!!

Regards,
Annika Linderson