Php not display any error or result with Mysql

[kaji rouji]

Hi All,
I write simple PHP and want to display any thing in browser

this is my page
<?



$mysqli = new mysqli( "abc.abc.com", "root", "xxxxx", "ticket" );

if( mysqli_connect_errno() ){
echo "Data Open Error :\n";
echo "Error Message? . mysqli_connect_error() . "\n";
exit();
}
else{
echo "Open Success?\n";
}


$mysqli->close();
?>

when I call this page in IE 6 on WinXP SP2, I can not find display anything.
means nothing display on my page , just like a blank

I use
<?
phpinfo()
?>

and get return infomation and set mysql options already in php.ini

Active Persistent Links 0
Active Links 0
Client API version 3.23.58
MYSQL_MODULE_TYPE external
MYSQL_SOCKET /var/lib/mysql/mysql.sock
MYSQL_INCLUDE -I/usr/include/mysql
MYSQL_LIBS -L/usr/lib/mysql -lmysqlclient

Directive Local Value Master Value
mysql.allow_persistent On
mysql.connect_timeout 60
mysql.default_host abc.abc.com
mysql.default_password xxxxx
mysql.default_port no value
mysql.default_socket /var/lib/mysql/mysql.sock
mysql.default_user root
mysql.max_links Unlimited
mysql.max_persistent Unlimited
mysql.trace_mode Off

I chekc with mysql database at console
and try to SQL statment on my ticket database and can get the retuen result

OS: Linux FC3
Php: Version 4.3.9

Does anyone can give me a hand or share experience

Thanks a lot