I can access to my website, www.timkhachhang.com. But, I (and my visitors) can download any file (.xls) from my site at www.timkhachhang.com/site/demo. It occurs error below: PHP: 403 Forbidden Access to this resource on the server is denied! Please tell me how to resolve it. Thank you! (I'm a vietnamse and my English is not very good. I'm so sorry about that).