Ricardo,
I just noticed you also posted
in this thread
. In general, please try to post only in one place. Also, after you upload images, you have to click the green arrow to actually insert them into a post to display.
With that said, I was able to find and look at your attachments. The issue is almost surely that you're using Joomla 3.0.3. That version is very buggy and hasn't been supported by Joomla itself in over a year. The latest releases are Joomla 3.1.6 and Joomla 3.2.0. JFBConnect has been tested extensively with Joomla 3.1.x and 3.2.0, and you shouldn't have problems with either of those releases.
All I can suggest for now is to upgrade your Joomla version. Upgrading from Joomla 3.0.x to the latest should be an easy process and will likely fix the issue above, and other issues you'd surely encounter with other extensions.
I hope that helps, but if you upgrade and still have problems, just let me know.
Thanks,
Alex