Blank screen with no error message and I can’t access my dashboard

Unfortunately, since january 20,2008 my blog disappeared and I can’t access the admin. area or my dashboard to try solv the problem. The addres of URI appear on the browser and no error message is displayed. I only see a blank screen.

This is the addres of my blog, the ” Debata, Desvende e Divulgue! “, brazilian of course: https://debatadesvendeedivulgue.com/blog

In my server(Yahoo Small Business Web Hosting) all the the data of the blog are OK, including the config.php, all necessary files and MySQL Database. CAUTION: I had created (is it correct in English?), at january, 22, another blog with similar name, but with the word “DDD -“, before the title of the blog (DDD – Debata, Desvende e Divulgue). This second blog is in the subdirectory “blog1” and is OK, with no runtime errors. It has the same theme and the same right side bar of the other.

I have an othter ticket not solved yet.

Please, help me urgent: the blog contains 45 articles, 144 comments, link to proper forum and near of 2800 visitors.

Thanks in advance!