After effects rotobrushing - background removed but showing up??

I have a problem.. im a beginner and need some help. i created a title sequence in after effects, added all the layers, rotobrushed a lot and the layers were nicely on top of each other with the backgrounds cut out/rotobrushed..then for some reason when i opened the file again, the backgrounds that i had removed were now showing up..see attached image? I tried to import the titel sequence into Premiere Pro and it looked the same? What am i doing wrong?

Hi and thaks for replying... i roto'd still images, not video clips...?? hoping for a quick and easy answer if its out there :) I must say, i dont know what i would do without palces liek Youtube and here!!! But sometimes you cant get a very specific question answered and you dont really want to read an entire tutorial to find the one answer you are looking for :))

yOure my hero..thank you..sorted it out... i really apprecaite it so much thanks!!!!!!!!!!!! :))))

First check in your AE project that you have a transparent background by toggling the checkerboard switch in the comp window. If you get the checkerboard pattern, then the problem must lie with your render, if you don't see the checkerboard, then you have a layer in your project that needs to be removed.

The next thing to check is that when you rendered your movie you set the output module -> Video Output -> Channels to RGB + Alpha.

Johnny Cuevas, Editor
Thinkck.com

"I have not failed 700 times. I have succeeded in proving that those 700 ways will not work. When I have eliminated the ways that will not work, I will find the way that will work."
---THOMAS EDISON on inventing the light bulb.