DNS Server search order

[Dan Track]

Hi

I've got a problem resolving some internal hosts. I've listed three
servers in my resolv.conf. The first two (ext1 ext2) are external and
the last is internal (int 1). With this setup I'm unable to resolve my
internal hosts.

However if I rearrange the dns servers so I now have

nameserver int1
nameserver ext1
nameserver ext2

I can resolve the internal hosts easily.

So my question is really why won't the hostnames get resolved if the
internal DNS server is last in the list to be queried ?

Thanks in advance for your help
Dan