Problems hosting .fr domains

We have been trying to host our .fr domain with dreamhost, in vain.

We are unable to change the DNS information with the registrar, and AFNIC (where we registered the domain) points us to their “zonecheck” page (link below), with an error message “Server doesn’t listen/answer on port 53 for TCP protocol”:

Does dreamhost support .fr domains at all? Or are we doing anything wrong? DNS gurus, please help.