Specific post instead of main page

Please, can anyone help me with this, I realized that an specific post is shown when I enter my site, it automatically goes to

http://mymusic-db.com/my_chemical_romance_-_the_black_parade_is_dead_2008_-_sleep/

Instead of just going to: http://mymusic-db.com/

I tried changing the theme but the problem remains. I also installed redirection pulg in, but it was working, I think it’s not the problem. Also I updated robots.txt and created a sitemap. Any suggestion?

Thank you