Why can't I open raw files from my Nikon D610 in CS5 with 6.7.0.339 camera raw ?
Well, the camera does not seem to be on the list, which would mean your version of ACR is too old for this particular camera.
http://www.adobe.com/special/photoshop/camera_raw/Camera_Raw_6.7_ReadMe.pdf
Retrieving data ...