PHP能连接数据库但是不能create database,如何解决

PHP能连接数据库但是不能create database,怎么解决？
先贴代码：

PHP code

<!--Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--><?php $con = mysql_connect("localhost");if (!$con){    die('Could not connect: ' . mysql_errno());}else{    echo "success" . "<br />";}if (mysql_query("CREATE DATABASE hello", $con)){    echo "Database created";}else{    echo "ERROR";}mysql_close($con);?>

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