[Freeswitch-users] Call Park issue

I just tried the call park based on the recent thread using the two blocks from http://wiki.freeswitch.org/wiki/Misc._Dialplan_Tools_valet_park#Valet_Autose... and sometimes it works as expected, and sometimes the caller that parks the call gets the MOH when they try to unpark the call when dialing the ext of the call they parked? Any idea what I am doing wrong? Thanks, jlc