So I using access database(*mdb). This my code and success to connect:
$db[\'test\'][\'hostname\'] = \'Driver={Microsoft Access Driver (*.mdb)};DBQ=C:\\blabl
Have you checked read/write access to that file? If your php app is running on IIS, then your IIS' user account will need to have read/write permissions to that file, not the user account you use to login to your computer.