After Effects CS6 and Prem. CS6

I created a video in Prem. CS6 and a Project in After Eff. CS6. I want to merge the two file to be under each other and then Opacity the Prem. CS6 in After Effects but I can't seem how to do it. I tried the merge in Prem. to like with After Effects but that does not work. The file in Prem CS6 is MTS format if this helps.

Thanks,

Joe