Hello! I use Plesk 7.5.1 and successfully created a Subdomain "subdomain.domain.com". But now I want to create an additional subdomain under "subdomain.domain.com" (e.g. subdomain.subdomain.domain.com or www.subdomain.domain.com). Every time Plesk says that I tried to use not allowed characters for a subdomain, if I try to create the subdomain "subdomain.subdomain" or "www.subdomain". What have I to do to create such a SubSubdomain?