Generate Managed Class from WMI in Visual Studio

I have a solution where I spiked a cusom WMI management class. I created a management class, registered the assembly using installutil, generated the management component through server explore and all was well. I'm now pushing a real implementation into my code base. I've done开发者_开发问答 all of the same things but when I try to "Generate Managed Class" as in the picture below, the menu item is disabled.

If I try to do this in any other VS solution, pointing to the exact same object in WMI, the menu option is enabled.

I can't seem to find an answer. The problem is obviously somewhere in this particular solution. I'm not sure where to look.

Thanks.

-Joe