PHP MS Access connection with COM

<?php
$db_conn = new COM("ADODB.Connection");
$connstr = "DRIVER={Microsoft Access Driver (*.mdb)}; DBQ=". realpath("./Northwind.mdb").";";
$db_conn->open($connstr);
$rS = $db_conn->execute("SELECT * FROM Employees");
$f1 = $rS->Fields(0);
$f2 = $rS->Fields(1);
while (!$rS->EOF)
{
print $f1->value." ".$f2->value."<br />\n";
$rS->MoveNext();
}
$rS->Close();
$db_conn->Close();
?>