Connecting to MS Access 2007 using ODBC_CONNECT - error in driver?

I have been successful in querying a Microsoft Access 2003 database (.mdb file) and now I am trying to do the same for a Microsft Access 2007. I have tried 开发者_JAVA技巧the following:

if($type[1]=='accdb'){
    echo 'accdb';
    //2007 Microsoft Access 
    $connection = odbc_connect("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=$mdbFilename;Persist Security Info=False;", $username, $password);

}else{
    echo 'mdb';
    //2000, 2003 Microsoft Access
    $connection = odbc_connect("Driver={Microsoft Access Driver (*.mdb)};Dbq=$mdbFilename", $username, $password);

}

However, for an access 2007 database I get this error:

Warning: odbc_connect() [function.odbc-connect]: SQL error: [Microsoft][ODBC Driver Manager] 
 Data source name not found and no default driver specified, SQL state IM002in SQLConnect 
in E:\export.php on line 38

In case anyone is wondering how to do this. This worked for me.

try{
    $dbh = new PDO("odbc:Driver={Microsoft Access Driver (*.mdb, *.accdb)};Dbq=$mdbFilename", $username, $password);
}catch(PDOException $e){
    echo $e->getMessage();
}

IKIK This is uber grave digging but..

$dbh = new PDO("odbc:Driver={Microsoft Access Driver (*.mdb, *.accdb)};Dbq=" . $mdbFilename, $username, $password);

This should work.