Hi Fabiao. This support forum is for sites hosted on WordPress.com only. Please contact your web host for issues related to hosting, or visit the support forums at WordPress.org for help with self-hosted WordPress.
You also need to know that this support forum is only for those who have free hosted WordPress>COM blogs and that is not a free hosted WordPress>COM blog.
In the future if you need help with that site and if you don’t have a username account at WordPress.org, click http://wordpress.org/support/ and register one on the top right hand corner of the page that opens, so you can post there.