Hi Andre,
Thank you for using National Instruments Forums. It is possible something happened to the board, but before we recommend sending the board in I have a few questions for you:
1. Is LabVIEW 8.0 still on the system or did you uninstall it?
2. Did you uninstall LV 8.0 before installing LV 8.2.1 or did you install 'on top'?
3. Did you reinstall NI-Motion 7.5?
If you have not done 3, I would recommend trying that out first. Having multiple copies of LV on the same system is not terrible, but there are some things to watch out for.
Let me know what you discover.
Justin Louie