[Freeswitch-users] DTMF event only captured on playback

I have set eventconsumer to all and I am able to capture events. However DTMF events can only be received while playback is going on from a session execute playback. Once the file has stop playing, DTMF events are no longer caught. It seems somthing is set during playback. What is needed in order to have DTMFS caputured as a event to a con:pop function even whilst no playback is running?