- $found = SQL_NUMROWS(SQL_QUERY_ESC("SELECT userid FROM `{!_MYSQL_PREFIX!}_user_data` WHERE userid=%s LIMIT 1", array(bigintval($sender)), __FILE__, __LINE__));
+ $found = SQL_NUMROWS(SQL_QUERY_ESC("SELECT `userid` FROM `{!_MYSQL_PREFIX!}_user_data` WHERE `userid`=%s LIMIT 1",
+ array(bigintval($content['sender'])), __FILE__, __LINE__));