I've moved your question to the Camera Raw forum
What OS do you have? The D4s was first supported in PS-CS6/CC using ACR 8.4, DNGC 8.4 and Lightroom 5.4.
The minimum system requirements for ACR 8.4 are Windows 7 or OSX 10.7.5.
The PS-CS6 upgrade from CS5 is $200 which is equivalent to 20-months of PS-CC+LR-CC at $10/month.