Server NTP on ConnectME

I try to use sntp features with connectME.
I have set all define in my appconf.h and bsp.h files
but nothing work !!

I 'm look for a REAL exemple with real code for start with sntp client.
for exe:
rc = NAstartSntp(IP1, IP2, 50,1, (SNTP_CALLBACK_T) SNTP_Erreur);
printf(“NAstartSntp rc:%d
\r”,rc );
rc is equal to -1 and
NAgetSntpTime(…) allway return -12.
I have set the two IP address for SNTP server. these address are good and work fine on another platform

Help me …