I have Adobe Creative Suite 6 and cannot open my NEF (Raw) files in Filmstrip Preview. I have uninstalled and reinstalled and upgraded but it still doesn't open. If you click on the file it opens Photoshop. I never had this problem before and it just happened one day. I use Windows 7 Professional.
This has nothing at all to do with InDesign. In fact I have no idea what it has to do with but you might try the Photoshop forum.
I would ask in Bridge Forum.
But you should also ask which camera type you have, as NEF is any Nikon file, but new cameras need upgraded CR plugins, as every NEF is different.
If it is a new camera, you are at the end with CS6 as its camera raw will not be updated any more, so you will have to subscribe to the Creative Cloud.