ZenWorks app objects/icons not appearing

Hi,

we have NetWare 4.2 and ZenWorks 2 (full version).
We have a problem that on certain 98 workstations the icon from the app object doesn’t appear anymore on users PCs after a while.
It doesn’t show up on the desktop, in NAL or in the startmenu.

All the system requirements are OK, anybody has any idea what can cause this?

It happens once in a while to a 98 station, no (obvious) reason why.

Thanks in advance,

Eduard de Vries