ZGani, I read your post reply of 11 months ago and I have a very similar problem to someone you obviously helped out when all of their blog posts disappeared. I have a similar situation and would ask if you would kndly take me one step further and tell me where I can find the database and PhpMyAdmin. I am unfamiliar with the location of these tools and have checked my WordPress interface for these without success.
You replied: You need to access your database and check if you still have the wp_posts populated with content.
Use your PhpMyAdmin to check the content - while you are there run the table maintenace under the Operations tab.
Thanks so much in advice for any help you can offer. Perry