I have an clustered DNS Server, as described in OES Cluster

DNS Server is working fine, but I want the DNS Server to listen to an
additional IP address (there are two physical subnets connected to the
cluster servers).

At the cluster resource load script I added a second "secondary ip
address", but the DNS server is not using it. It does not answer on this
address and the DNSDHCP Management Console only shows the first IP
adress to be in use by the DNS server.

Even after modifying the "listen-on" property of the dns server, it's
still listening only on the first address.

Is there a way to convience it to use both addresses?

Thanks in advance,