我可以在命令行中远程连接到mySQL数据库，但不能使用php脚本

错误：致命错误：.......中未捕获到消息“ SQLSTATE [28000] [1045]用户'tech'@'localhost'（使用密码：是）的异常'PDOException'

我可以在命令行中进行远程连接，但不能使用php，在哪里可以找到任何想法？

详细信息如下：

网络服务器A：1.1.1.1拥有php脚本：

$REGIS_DB_SERVER = "2.2.2.2"; //I've tried the IP as well as "pretendhostname.com"
$REGIS_DB_NAME = "db_name";
$REGIS_DB_USER = "tech"; // or any other user name
$REGIS_DB_PASSWORD = "password";

//connect to db
$db = new PDO("mysql:host = $REGIS_DB_SERVER; dbname=$REGIS_DB_NAME; charset=utf8", $REGIS_DB_USER, $REGIS_DB_PASSWORD);
print_r($db -> errorInfo());
echo "Connected<br>";

$sql = "CREATE TABLE Test(PersonID int,LastName varchar(255),FirstName varchar(255),Address varcha(255),City varchar(255))";
$result = $db->query($sql);

echo "$result <br>";

?>

Web服务器B：2.2.2.2拥有mySQL数据库：运行Ubuntu 11.04

在/etc/mysql/my.cnf中

# Instead of skip-networking the default is now to listen only on
# localhost which is more compatible and is not less secure.
#Commented out to allow remote connections to this database
#bind-address           = 216.70.81.240

我跑步mysql> select Host,User from user;得到：

+-----------------------+------------------+
| Host                  | User             |
+-----------------------+------------------+
| %                     | root             |
| 127.0.0.1             | root             |
| 1.1.1.1               | tech             |
| localhost             | debian-sys-maint |
| localhost             | root             |
| localhost             | tech             |
+-----------------------+------------------+

在ubuntu 12.04中打开端口3306，以允许从任何ip连接到mysql暗示这不是iptable问题，并测试连接：

我使用SSH进入Web服务器A 1.1.1.1并运行：

mysql -u tech -p -h 2.2.2.2
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 200672
Server version: 5.1.63-0ubuntu0.11.04.1 (Ubuntu)