MSSQL and PHP

Im getting an error when i try to connect to my database with php, this is my code:

$serverName = "sql2k510.discountasp.net";
$uid = "SQL2005_******_******_user";
$pwd = "******";
$databaseName = "SQL2005_******_******";

$connectionInfo = array( "UID"=>$uid,
"PWD"=>$pwd,
"Database"=>$databaseName);

/* Connect using SQL Server Authentication. */
$conn = sqlsrv_connect( $serverName, $connectionInfo);

/* Check the connection to be done */
if ( $conn )
{
echo "Connection established.\n";
}
else
{
echo "Connection could not be established.\n";
die( print_r( sqlsrv_errors(), true));
}

What is wrong with it?

 

Actually the whole error is this:

Connection could not be established. Array ( [0] => Array ( [0] => IM003 [SQLSTATE] => IM003 [1] => 160

Code:

 => 160 [2] => Specified driver could not be loaded due to system error 14001 (SQL Server Native Client 10.0). [message] => Specified driver could not be loaded due to system error 14001 (SQL Server Native Client 10.0). ) )

 

You mean server name? it says web137