I am trying to do a fresh install of WordPress on my blog. I started off by cleaning out my entire blog folder (aftter backing it up on my machine). However, I cannot delete the following folders, I keeping getting a 'Directory not empty' message. I have verified that these directories are empty. I am using FileZilla to ftp. Since I cannot delete the wp_content folder, a new install fails. Any idea why these folders cannot be deleted though they look empty?