koneksi ke client sql server 2008 r2

saya mau tanya, waktu coding di localhost untuk koneksi ke client sql server 2008 r2 tidak bermasalah sesudah saya upload ke hosting jadi error, ini contoh scriptnya

terima kasih, mohon atas bantuannya

 <?php

    echo "Mengakses SQL Server : ";

    $serverName = "servername";
    $connectionOptions = array('Database'=>'Sampel', 'UID'=>'sa', 'PWD'=>'sasa12345');

    $conn = sqlsrv_connect( $serverName, $connectionOptions);
    if( $conn === false )
    {
        echo "Could not connect.\n";
        die( print_r( sqlsrv_errors(), true));
    }
    else {
        echo "koneksi berhasil..!";
        echo "Data item :"
        ;

        $tsql = "select salesid,salesname,address,city FROM DBO.MSsales";
        $result = sqlsrv_query($conn, $tsql);

        while($row = sqlsrv_fetch_array($result, SQLSRV_FETCH_ASSOC))
        {
          echo$row['salesid']. ', ' .$row['salesname']. ',' .$row['address']. ',' .$row['city']. '<br />';
        }

        sqlsrv_close($conn);
    }
//phpinfo();

?>