First, you need to change your Front Page settings:
1) Create a Static Page, called “Blog” (and a slug of “blog”)
2) Create another Static Page, to serve as your site Front Page
3) Go to Dashboard -> Settings -> Reading
4) Change “Front Page Displays” from “Your latest posts” to “A static Page (select below)”
5) In the “Front Page” dropdown, select the Static Page that you created to serve as your site Front Page
6) In the “Posts Page” dropdown, select the Static Page “Blog”
Next, you need to fix your permalinks:
1) Go to Dashboard -> Settings -> Permalinks
2) Select one of the default options (“Month and Name” is usually good)
3) Save settings, to write the rewrite rules to .htaccess
Now dekho.com.au/blog should be displaying your blog posts index