rate stretch tool on premier I have made a sequence on adobe premier. One of the clips I have stretched using the stretch rate tool and another I have compressed using the same tool.  

I have made sure the clips are video blended. However when I render the sequence into a QuickTime movie the clips I've slowed down and speed up are green and damaged. Does anyone please know why this is and how I can fix it? Many thanks
Probably you forgot to change framerate of composition.