Problem whit encoding

Hello people,
I’m using playsms to send sms through nrsgateway, but I’m having trouble encoding.
When I send a message with accents I get it with unrecognized string.
For example: the string “posição” I get as a posi??o
See below, that both in the database and in the report of the playsms they are correct;

can anybody help me?

my locale

:~# locale
LANG=en_US.UTF-8
LANGUAGE=en_US.UTF-8
LC_CTYPE=“en_US.UTF-8”
LC_NUMERIC=“en_US.UTF-8”
LC_TIME=“en_US.UTF-8”
LC_COLLATE=“en_US.UTF-8”
LC_MONETARY=“en_US.UTF-8”
LC_MESSAGES=“en_US.UTF-8”
LC_PAPER=“en_US.UTF-8”
LC_NAME=“en_US.UTF-8”
LC_ADDRESS=“en_US.UTF-8”
LC_TELEPHONE=“en_US.UTF-8”
LC_MEASUREMENT=“en_US.UTF-8”
LC_IDENTIFICATION=“en_US.UTF-8”
LC_ALL=en_US.UTF-8