Mercury playback engine and Quadro K2000

We just replaced our Quadro 2000 graphics card more than 30 days ago with a Nvidia Quadro K2000 graphics card per recommendation.  The latest 377.48 drivers were successfully installed from Download Drivers | NVIDIA​.  Our computer no longer locks up as a result of this new graphics card. 

We are told the only support Adobe provides for CS6 is via this forum.  We are using Adobe Premiere Pro CS6 and just realized the Mercury Playback Engine GPU acceleration option is grayed out and we longer get audio sound when playing back existing projects in Adobe Premier CS6. 

We have followed the instructions outlined in the Answer to this question:  https://forums.stage.adobe.com/message/6276307#6276307​

• Add a line for the graphics card "Quadro K2000" to the cuda_supported_cards.txt.
• Run the GPUSniffer.exe.
• Change the "Managed 3D Settings" as shown below. 

The Mercury Playback Engine GPU acceleration option is now enabled on our computer, but we still have no audio in Premiere Pro CS6!  Nvidia is saying this K2000 card is no longer compatible with Adobe Premier CS6.  I know we checked the Adobe website and it was compatible a 6 weeks ago when I was ordering a replacement card.

Any suggestions on how to get the Quadro K2000 working with Adobe Premiere CS6?  Are there different drivers that need to be installed?

Thanks for any help or recommendations!

Below are screenshots  details of my machine: