[Elecraft] K3 filter in data wont go to 0.05 width

[goldtr8 at charter.net]

Dear Group,

I am unable to get my K3 in DATA-A or DATA-R to allow the DSP filter to 
go tighter than .15 khz.  But it does go to 0.05 in CW.

Per the guys at Elecraft I should be able to tighten it up to that 
level.   However, I am guessing that I have something set wrong 
elsewhere.

I am also coupled to HRD and DM780 if that makes any difference at all. 
It makes no difference if HRD is on or off.

I have also verified that I am at the current release level of software.

So I need some help in finding what bit I put in the wrong place.

Don
KD8NNU