Hey guys ive had success with your help before so i figured id ask again.

Im using Xilisoft video ultimate converter 6.0 and have all the latest updates. The one issue i seem to be having is using the effects preview screen. While it goes through the video with sound the actual screen stays blank making it almost impossible to edit. Anyone have any idea?
im using a quad core processor and vista and also have to use this specific program for work.

Also dont have problems viewing the files with mediaplayers, just the effects preview.

Any help would be greatly appreciated.