[Freeswitch-users] cepstral problem

I have one sentence like this in my dialplan <action application="speak" data="cepstral|david|want pizza"/> so when I start FS from a console directly in foreground the voice works. if I start FS from the init script in background, the voice becomes silence and nothing is running after this in the dialplan. if I want to shutdown manually FS, it makes a segmentation fault with core dump. Any idea ? Thanks