If you have the problem of not being able to see the Blog Module page after enabling it, and you are using Clean URL for your site, then it's *probably* because you have accidentally created a subdomain with the name 'blog' (e.g. http://blog.example.com), or you have a subdirectory named 'blog' on your website's root folder (www, htdocs or public_html). You should be able to see Drupal's Blog Module after you remove the subdomain / subdirectory with that same name.