You have the mask highlighted do the mouse clicking on the adjustment icon instead of the mask
Thanks for the suggestion but that has no effect on them being grayed out or not. When this problem occurs it does not matter if the Mask is highlighted OR the adjustment itself.
But thanks anyway.
I am currently without the issue on the above example having removed the problem by adding additional adjustment layers and removing them again. Even if I now select just the adjustment mask I can still access ALL adjustment controls without problem.
But it will occur again as it has done over the last few months on a random basis. Hopefully someone else has seen this occur and found a solution?
This has been driving me nuts for days and I think I have finally figured it out. (I'm also using CS5 extended.)
In the screenshot below, you will see an icon in the Color Balance adjustment panel. Somehow I must have clicked on it to get the expanded view in which the radio buttons grey out. Clicking on it again brings back the standard view and the buttons. I'm guessing this will fix your selective color adjustment panel buttons as well.
This was the solution for me, not 100% sure if it will work for others: I was working on a jpg file. When I saved it and turned it into a psd, I was able to use the color balance layer correctly.
Best of luck