I make anime music videos. I've had Vegas 8 for a few days now, and every time I'm less than 10 seconds into editing a video, the picture will go black and I can't get it back. I have lost every project I've tried so far in this manner. It seems normal in the timeline, and continues to accept effect adding and moving of the clip itself. It just doesn't show up at all in the preview. Can anyone help me??????