Hi, Thanks for reading. I extracted xenForo files to my laptop, then I used Filezilla (binary mode) to upload all the files to my server. The problem is, I faced Internal Server Error when I am trying to install. Then I seek help from my hosting provider. They told me my files permissions are wrong (and something about suphp) hence the error occurred. I was wondering why the permissions gone wrong (or they were originally set to be folders:0775 and files:0664)? As what I know, normally they supposed to be folders 755 and files 644 aren't they? did I do anything wrong in the uploading steps as per described? Hope to hear from you guys. Thanks.