SQL Server 2008 IIS7 PHP - Unable to connect

I am trying to use PHP to connect to SQL Server 2008. I keep getting the following message.

Unable to connect.
Array ( [0] => Array ( [0] => 08001 [SQLSTATE] => 08001 [1] => 2 [code] => 2 [2] => [Microsoft][SQL Native Client]Named Pipes Provider: Could not open a connection to SQL Server [2]. [message] => [Microsoft][SQL Native Client]Named Pipes Provider: Could not open a connection to SQL Server [2]. ) [1] => Array ( [0] => HYT00 [SQLSTATE] => HYT00 [1] => 0 [code] => 0 [2] => [Microsoft][SQL Native Client]Login timeout expired [message] => [Microsoft][SQL Native Client]Login timeout expired ) [2] => Array ( [0] => 08001 [SQLSTATE] => 08001 [1] => 2 [code] => 2 [2] => [Microsoft][SQL Native Client]An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. [message] => [Microsoft][SQL Native Client]An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. ) )


Here is the code I have been using.

<?PHP
 /* Specify the server and connection string attributes. */
 $serverName = "(local)"; 
 $connectionInfo = array( "UID"=>"sa", "PWD"=>"PASS",  "Database"=>"MARISTEST");
 /* Connect using SQL Server Authentication. */
 $conn = sqlsrv_connect( $serverName, $connectionInfo);
 if( $conn === false )
 {
 echo "Unable to connect.</br>";
 die( print_r( sqlsrv_errors(), true));
 }
 $tsql = "SELECT * FROM users";
 $stmt = sqlsrv_query( $conn, $tsql);
 if( $stmt === false ) 
 {
 echo "Error in executing query.</br>";
 die( print_r( sqlsrv_errors(), true));
 }
 $data = "[";
 while($row = sqlsrv_fetch_array( $stmt, SQLSRV_FETCH_ASSOC))
 {
 $data = $data . json_encode($row) . ", ";
 }
 $data = $data . "]";
 echo $data; 
 /* Free statement and connection resources. */
 sqlsrv_free_stmt( $stmt);
 sqlsrv_close( $conn);
 ?>

I have checked that remote connections are allowed for the server by right clicking on the instance name in SSMS, I then click on Properties and went to Connections.  Allow Remote connections to this server is checked.  Also I have installed the Native Driver for PHP.  I am using the PHP Driver for Windows which was installed by the Web Platform Installer and confirmed in phpinfo() that sqlsrv was present.  I have tried using (local), MARIS-IDX01/MARISIDX, ./MARISIDX, and localhost/MARISIDX.  All yield the same result.   

I have been scouring the internet looking for solutions but nothing has been able to help with my problem.  Any ideas please???.

Thanks in advance