Internet Unknown (28)

We have been unable to resolve =E2=80=9Cpolaris.co.in=E2=80=9D and we can't=
seem to figure it out. If we run an nslookup from our DNS server we don=
=E2=80=99t get a response from the polaris.co.in DNS server.=20=20

If we run:
nslookup=09
> set d2
> set type=3DMX
> polaris.co.in

Server: xxxxx.yyy.com
Address: xxx.xxx.xxx.xxx

;; res_nmkquery(QUERY, polaris.co.in, IN, MX)
------------
SendRequest(), len 31
HEADER:
opcode =3D QUERY, id =3D 17646, rcode =3D NOERROR
header flags: query, want recursion
questions =3D 1, answers =3D 0, authority records =3D 0, additio=
nal =3D 0

QUESTIONS:
polaris.co.in, type =3D MX, class =3D IN

------------
timeout
timeout
timeout
timeout
SendRequest failed

=09
Here are the results from a snoop run on our DNS server.

xxx.xxx.xxx.xxx -> 202.54.218.7 DNS C polaris.co.in. Internet MX ?
xxx.xxx.xxx.xxx -> 202.54.70.3 DNS C polaris.co.in. Internet MX ?
xxx.xxx.xxx.xxx -> 202.54.70.3 DNS C dns3.polaris.co.in. Internet Unknown =
(28) ?
xxx.xxx.xxx.xxx -> 202.54.70.3 DNS C dns1.polaris.co.in. Internet Unknown =
(28) ?
xxx.xxx.xxx.xxx -> 202.54.70.3 DNS C dns2.polaris.co.in. Internet Unknown =
(28) ?
xxx.xxx.xxx.xxx -> 202.54.70.3 DNS C polaris.co.in. Internet MX ?
xxx.xxx.xxx.xxx -> 202.54.189.3 DNS C dns2.polaris.co.in. Internet Unknown =
(28) ?
xxx.xxx.xxx.xxx -> 202.54.189.3 DNS C dns1.polaris.co.in. Internet Unknown =
(28) ?
xxx.xxx.xxx.xxx -> 202.54.189.3 DNS C dns3.polaris.co.in. Internet Unknown =
(28) ?
xxx.xxx.xxx.xxx -> 202.54.189.3 DNS C polaris.co.in. Internet MX ?
xxx.xxx.xxx.xxx -> 202.54.189.3 DNS C polaris.co.in. Internet MX ?

I would tend to think something is wrong with the polaris.co.in NS servers,=
but others have told me then can resolv this domain just fine.=20=20

Any help would be appreciated.