Preventing anonymous users from seeing the last poll block

Hi, I've just added this module to replace the core poll module. The problem that I have is that I don't want anonymous users to see the last poll block; only logged users should see it. With the core poll module, this was no problem, since I just didn't give any permissions to anonymous users, but with Advpoll, even though anonymous users don't have any permission (the site is used as an intranet), they can see the last poll block. How can I prevent unlogged users from seeing the last poll block?

Thanks
Yersin