Have you downloaded and installed the importer and exporter AE plugins from Maxon?
no, because my After Effects is CC 2014
If you want to import a C4D file, you have two choices: use Cineware to import a C4D file (thus using AE to render it) or install the correct plugins from Maxon to import an AEC file with camera, light, null object info and all your C4D-rendered files.
Here's how to use Cineware: details of CINEMA 4D integration with After Effects
Here's where to get the AEC-opening plugin: MAXON | 3D FOR THE REAL WORLD: Plugins
ok, I'll try it out, thanks