sql2005-axmpp 的php串連SQL2005有錯誤，麻煩各位指導一下

sql2005phpxampp

錯誤是Fatal error: Call to undefined function sqlsrv_connect() in D:\xampp\htdocs\test\connsql.php on line 17

我是這樣做的：
要到http://msdn.microsoft.com/en-us/sqlserver/ff657782.aspx自行下載微軟提供的The SQL Server Driver for PHP。
下載後解壓縮，將所有的.dll檔案拷貝到php安裝目錄的ext檔案夾中，接下來開啟php.ini，添加以下語句開啟php_sqlsrv和php_pdo_sqlsrv擴充：
——————————————————–
[PHP_PDO_SQLSRV]
extension=php_pdo_sqlsrv_56_ts_vc6.dll
[PHP_SQLSRV]
extension=php_sqlsrv_56_ts_vc6.dll

—————————————————

按照上邊的做了，同時安裝了Microsoft Microsoft SQL Server 2008 R2 Native Client MSI，還是有錯
這是我的連結語句

//本地測試的服務名
$serverName = "(127.0.0.1)";
$connectionInfo = array( "UID”=>”sa",
"PWD"=>"123456",
"Database"=>"FPAttendance");
$conn = sqlsrv_connect( $serverName, $connectionInfo);
if( $conn )
{
echo "Connection established.\n";
}
else
{
echo "Connection could not be established.\n";
die( print_r( sqlsrv_errors(), true));
}
?>

錯誤是Fatal error: Call to undefined function sqlsrv_connect() in D:\xampp\htdocs\test\connsql.php on line 17

