hi I have try to build mod apllicatiion to dectect tone like mod_spandsp and I have error below: *2012-04-12 16:04:18.194204 [CRIT] switch_loadable_module.c:1300 Error Loading module /usr/local/freeswitch/mod/mod_tone.so **/usr/local/freeswitch/mod/mod_tone.so: undefined symbol: super_tone_rx_release*** Makefile: BASE=../../../.. LOCAL_OBJS=common.o LOCAL_LDFLAGS = -ljpeg -lz -lutil include $(BASE)/build/molo dmake.rules Please tell me these lib that I need to build application? B&R Dinh Thuc