AlterVista banner does not appear

Hello !

First of all, I would like to thanks the AlterVista team for your awesome site.

I'm creating a commercial site. As I saw in the term §6.2 (en.altervista.org/terms.php#6.2) I have to display an Altervista banner.
This banner does not appear. I tried different type of banners but nothing happens even if I create a very small HTML page with only the banner:
http://yabresse.altervista.org/test_banner.html

Thanks for your help,
Yabresse

I have found the problem. It works better without the ABP Firefox plugin
Sorry for this thread...