[Elecraft] Question on KDSP2

[Tom McCulloch]

I have a question on the KDSP2, the DSP filter for the K2

I have K2 firmware version 2.04P  installed in my K2, as shown when I press 
any key on power up.  I also have KDSP2 firmware version 3.16 installed. as 
shown on the display when entering the appropriate commands.

According to the KDSP2 Manual Errata (presently posted on the Elecraft web 
site) I should be able to toggle the Autonotch and the Denoiser on and off 
directly from the K2 front panel by simultaneously pressing and holding 
AFIL+SPLIT and AFIL+REC, respectively.

When I do this I get a message on the LED "Not Installed" (appropriately 
abbreviated, of course).

I am able to perform all of the other DSP functions except for these.

Can anyone tell me what I am doing wrong or how I can track down this 
problem

Thanks in advance for your help

Tom McCulloch
WB2QDG
K2 1103