iOS Video doesn't play from DocumentDirectory

Hi,

     I've an app that plays videos fine that we package with the app. But when I place new videos

in the DocumentsDirectory it won't play them. The videos are there as I can see them in  itunes

FileSharing.

     Even if I copy the packaged video that plays to the documentsDirectory it will no longer play

from there.

     This is on an iPad iOS 5.

Any ideas?

Thanks.