I added a transition in SV 9, but when I want to see how it looks like in the preview window, it is very slowly and there's no time for it to develop. It just passes to the next part of the video, the one that follows the transition. I rendered the video to see if the transition applied and it is just ok, but I need to be able to see it ok in SV too, you know... 
What can I do?
What can I do?