Someone plz reply to this ...

sms is working but partially . i am able to send msgs to only few mobiles like i cn send oly to android devices and java devices but i am not able to send it to symbian based phones ( this may sound stupid ) but i verified it with few phones
like i tested it with 3 s60 based phones and other java and android phones .
sms to symbian is not working for me ... Anybody else with this problem ??