[Freeswitch-users] Music on hold

When I receive a call and place it on hold, the calling party receives MOH as specified in <X-PRE-PROCESS cmd="set" data= hold_music=/usr/local/freeswitch/sounds/music/8000/moh.WAV"/>. Also, I transfer this call to another extension, the caller receives MOH during the transfer, however, If I place an outbound call then place the party on hold, they just get silence. Am I missing a basic setting here. I also cannot transfer this call or park it. Using snom 3xx, 7xx and 8xx phones. Thanks, Darcy Primrose