Speex dev - Jul 2005 - speex_encode segfault

Hi,
i'm following encoder example in the manual.pdf of speex documentation.
Here's
my portion of code:

int SPEEX_EncodePCM(struct _IDA_ClientSocket *IDA,char *buffer,unsigned char 
*PCM,int num_samples) {
    int ret,c,d=0,nbBytes,ttBytes=0;
    float PCM_F[160];
    char cBits[200];
#ifndef DISABLESPEEX
    speex_bits_reset(&IDA->speex_bits);
    for(c=0;c<num_samples;c++) {
	PCM_F[d] = (float)((int)PCM[c] << 8) - 32640; 
	if(d >= 159) {
	    speex_encode(IDA->speex_state,PCM_F,&IDA->speex_bits);
	    nbBytes = speex_bits_write(&IDA->speex_bits, cBits, 200);
	    memcpy(buffer+ttBytes,cBits,nbBytes);
	    ttBytes += nbBytes;
	    d = 0;
	} else {
	    d++;
	}
    }
    LOG_Write(LOG_DEBUG,"[%s:%d] Speex frame: 
%d\n",__FILE__,__LINE__,ttBytes);
    return ttBytes;
#endif
}

int SPEEX_Init(struct _IDA_ClientSocket *IDA) {
    int tmp;
    IDA->speex_state = speex_encoder_init(&speex_nb_mode);
    tmp = 8;
    speex_encoder_ctl(IDA->speex_state, SPEEX_SET_QUALITY, &tmp);
    speex_bits_init(&IDA->speex_bits);
}	

int SPEEX_Close(struct _IDA_ClientSocket *IDA) {
#ifndef DISABLESPEEX
    speex_bits_destroy(&IDA->speex_bits);
    speex_encoder_destroy(IDA->speex_state);
#endif
}

when i run this code gdb say me:

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 49156 (LWP 5719)]
0x405195cc in speex_encode (state=0x7ec30d93, in=0xbf3ff624, bits=0x80955bc) 
at modes.c:575
	in modes.c
(gdb) 

i'm using speex 1.0.5. Someone can help me ?

Thanks ! Oz

-- 
----
O-Zone ! No (C) 2005
www.zerozone.it