[Freeswitch-users] How to replay an audio when a ' * " (star key) is pressed?

Hi there, I would like to play an audio to the channel and then if the callee presses a ' * ' and the audio would replay immediately from the beginning, how can I do that? I am using C#. Currently I am calling PlayAndGetDigits() and would play an audio. I am also subscribing a DTMF event, when I find a DTMF = ' * ' I would call this command "uuid_displace " + <unique ID> + " start " + <file name> + " 20" " to play the audio again. The problem is that it seems like the event come in after 6 or 7 sec after the callee presses the key. What am I doing wrong or is there a better way to do this? Thank you. Frankie