As this is the first time we’ve heard of this issue, we do not know what is causing the problem. As such, it is probable that it is something specific to your environment. Does it happen on more than one workstation?
Have you tried uninstalling/reinstalling:
1. Formativ Runtime and Formativ Message Saver; and
2. the GroupWise Client?
Can you think of any other potential factors, such as Windows Registry rights/access?