[Leica] Monochrom problem solved

[Douglas Nygren]

Thanks to Chris Crawford I have an answer to why my Monochrom files were not opening in CS6.
Chris wrote that Nik won't open a file that isn't rgb.
The fix is simple:
Go to top of screen to Image>Mode>RGB
After you do that, go to Filter and you will see that Nik is now highlighted. When you click on Sliver Efex Pro 2, you Monochrom file will now open. 
Many thanks to Chris. 
The lug once again proves its worth and  spirit of community.
Best to all,Doug