mysqli_connect（）:( HY000 / 2002）：连接被拒绝（远程MySQL）

Question

I have one shared Cpanel Hosting and one My own server with cpanel hosting. I am trying to connect from shared cpanel hosting to my own server for get data from my own server. I have added my shared cpanel hosting IP to my server cpanel in remote MySQL section but I am getting above error. I have also added that IP from WHM but not success. I have checked that port 3306 also open. I do not know whats issue. I have tried below connection type but same error always.

$SERVER_NAME = "195.201.XXX.XXX";
$USER_NAME = "MyUserName"; 
$PASSWORD = "MyPass";
$DATABASE = "Mydb";

    $conn = mysqli_connect($SERVER_NAME, $USER_NAME, $PASSWORD, $DATABASE,"3306");

    if (mysqli_connect_errno())
  {
  echo "Failed to connect to MySQL: " . mysqli_connect_error();
  }

I have also tried below code

 $SERVER_NAME = "195.201.XXX.XXX";
    $USER_NAME = "MyUserName"; 
    $PASSWORD = "MyPass";
    $DATABASE = "Mydb";

        $conn = mysqli_connect($SERVER_NAME, $USER_NAME, $PASSWORD, $DATABASE);

        if (mysqli_connect_errno())
      {
      echo "Failed to connect to MySQL: " . mysqli_connect_error();
      }

But I am getting error like this

Failed to connect to MySQL: Connection refused 

and in error log like this

mysqli_connect(): (HY000/2002): Connection refused in

Let me know whats wrong with it and how can I solve it. Thanks