If you appended the data, you will still need to apply it to the objects in your new file.
You will need to select each object and then select the animation data block it should use in the action editor.
Another way to try to make it easier is to append the entire scene to your new file, that way the animation data will already be applied in your new scene. Although it really is just a copy of the old file so if you had made changes to the scene in the new version, that won’t propogate.
Hope that helps Joey.
