Welcome to UI by Design.  A person can spend a lot of time with the User Interface (UI) of software during a day.  Often times, a worker spends more time with software than with his or her family and friends.  Yet

Write Permissions

To be able to log in to the blog and writing posts, you need to enable write permissions on the App_Data folder. If your blog is hosted at a hosting provider, you can either log into your account’s admin page or call the support. You need write permissions on the App_Data folder because all posts, comments, and blog attachments are saved as XML files and placed in the App_Data folder.