Can I forward DNS request using TCP?

[igor]

I have configured a forward DNS server in Linux, unfortunately it
seems that the UDP packets are being lost therefore my server is
giving "service failure" to its clients.

I haven't found a way to make the forward requests go via TCP over the
forwarders.

Can you please tell me if this is doable or not? Is there a parameter
on named.conf or named.boot I need to change or do I need to get the
named source and "hack it".

Any information is greatly appreciated!

IgoR
Phoenix.