[Freeswitch-users] This channel was not configured to use INFO DTMF message while reviewing VoiceMail messages

Hi, I get "sofia.c:7679 IGNORE INFO DTMF(7) (This channel was not configured to use INFO DTMF!)" or similar for any key pressed while reviewing VoiceMail. I will say up front, this is just a warning and everything WORKS fine. However, I would like to understand what I am missing in my config. I have googled it with very limited success. endpoint is Cisc0 SPA504g FS Version: FreeSWITCH Version 1.2.22+git~20140309T212137Z~65fed130e5~64bit (git 65fed13 2014-03-09 21:21:37Z 64bit) Thanks, Sean