Sending SMS Using SendGatewayMessage

Hello,

i'm using SendGatewayMessage to send SMS thru an SMPP provider.

All works fine ,  but with a little problem: i can't send message with "special" character like "è" or "ò" or "ì", because they are not correctly interpretate and received message haven't this character.

I've open a ticket to SMPP provider that reply me to verify "DCS" value (it must be equal 0).

I've search in gateway config file but i've not found nothing about "characters" or "DCS".

Anyone can help me ?

Thank's in advance !!