I have produced a short film in premierepro with a 6 second after effects (AE) clip on the end. When I export media for a FLV/F4V file to upload to youtube, the AE doesn't show in the final film. I can see it as it is encoding and there is 6 seconds of blank at the end of the film. I can't understand where I am going wrong. I did this using the same clip several weeks ago and it worked OK, whereas I have tried it again with this film and now it won't show. I have altered the AE clip slightly - only changing font colour but other than that all things are the same

Any ideas?