Directory opus 8.0.1 pops up and disappears after installing

The version 8.0.1 worked well on my windows xp SP2 computer, until I installed National instrumensts' Labview 5.1 software.
When I click on 'new lister', a lister is shown for a short time and then closes.
What can I do to prevent this?
Erik Thoonen.

Uninstall Labview?