[RTTY] MMTTY problem with mark frequency moving

[Stein-Roar Brobakken]

Hi

during ARRL roundup I had problem with MMTTY modul in Writelog as the
markfrequency moving far way down even with AFC checked.... from 2125 down
to 18-1900 hz. I had to grab the mouse and move it back to 2125... all the
time.
I am running two RTTY windows as "CLONE RX" as one is fixed at 2125 without
AFC and the other window has AFC checked.

Example photo of this MARK frequency from AA5AU web.
http://www.rttycontesting.com/writelog/mmtty/plugin22b.gif

any suggestion to solve this ?

73s LA6FJA RAg