Sorry to hear about your problems.
This kind of error can often happen if you have made changes to your video settings such as altering resolution for a new monitor, changing refresh rates, changing hardware acceleration settings etc. If you have made changes recently that could be the cause.
Also have you run dxdiag.exe and looked at the Display tab. It should tell you if any problems were found. It will also tell you if all the DirectX features are enabled. Instructions on how to run dxdiag.exe can be found at the link below:
http://forum.reallusion.com/Topic55-13-1.aspx
It is also advisable to update your graphic drivers to the very latest. You could also try reinstalling DirectX to the latest version to see if that helps.
If the problem persists contact Support using the form below:
http://www.reallusion.com/CustomerSupport/User/QForm.aspx
I hope you get this resolved soon.
Peter EdwardsForum Moderator
iClone Daily Blog