Cannot send & save calendar entries in webaccess client

Hi all,

this is a strange effect:

Certain users cannot send meeting invitations or accept meetings or save & close appointments in their webaccess clients.

It depends on the authenticated user:

on my machine:

Logged in web access with my user all calendar functions are ok.

Logged in as one of those users - functions are not working.

ACL is always manager for the user.

no error message - in the browser or in the server’s log.

browser is firefox 3.0.14 (Java security messages have been always accepted)

Do anyone has a hint where to look at?

UPDATE:

We found out that the error occurs when the user ALLOWS !! the following action:

A script from “International Business Machines Corporation” is requesting enhanced abilities that are UNSAFE and could be used to compromize your machine:

Run or install software on your machine

Modify an open window

If you ALLOW - the effect/error occurs

if you DENY - you can successfully save and close the window!

thanks a lot

Uwe