resolving error

["조은선"]

Hi, all~ 

I have a problem  in resolving of my DNS server.
The domain is   tradeloop.com  

DNS servers in same network , one( os  Linux) can resolve, the others(Tru64 unix) can't.

difference in servers  is only  OS.   
I can't  understand   why  tru64unix server  can't resolv,
Servers that can't resolve  can access  the authoritative ns , but can't get answer..  messge is  timed out. 

query output  is below

help me~   

sincerely~ 

  
***************************************************************
> server auth02.ns.harvard.net
Default Server:  auth02.ns.harvard.net
Address:  209.21.182.4

> www.tradeloop.com
Server:  auth02.ns.harvard.net
Address:  209.21.182.4

*** Request to auth02.ns.harvard.net timed-out
*****************************************************************
# dig www.tradeloop.com +trace

; <<>> DiG 9.2.3ngDN-031103 <<>> www.tradeloop.com +trace
;; global options:  printcmd
.                       447721  IN      NS      H.ROOT-SERVERS.NET.
.                       447721  IN      NS      C.ROOT-SERVERS.NET.
.                       447721  IN      NS      G.ROOT-SERVERS.NET.
.                       447721  IN      NS      F.ROOT-SERVERS.NET.
.                       447721  IN      NS      B.ROOT-SERVERS.NET.
.                       447721  IN      NS      J.ROOT-SERVERS.NET.
.                       447721  IN      NS      K.ROOT-SERVERS.NET.
.                       447721  IN      NS      L.ROOT-SERVERS.NET.
.                       447721  IN      NS      M.ROOT-SERVERS.NET.
.                       447721  IN      NS      I.ROOT-SERVERS.NET.
.                       447721  IN      NS      E.ROOT-SERVERS.NET.
.                       447721  IN      NS      D.ROOT-SERVERS.NET.
.                       447721  IN      NS      A.ROOT-SERVERS.NET.
;; Received 436 bytes from 168.126.63.18#53(168.126.63.18) in 0 ms

com.                    172800  IN      NS      a.gtld-servers.net.
com.                    172800  IN      NS      g.gtld-servers.net.
com.                    172800  IN      NS      h.gtld-servers.net.
com.                    172800  IN      NS      c.gtld-servers.net.
com.                    172800  IN      NS      i.gtld-servers.net.
com.                    172800  IN      NS      b.gtld-servers.net.
com.                    172800  IN      NS      d.gtld-servers.net.
com.                    172800  IN      NS      l.gtld-servers.net.
com.                    172800  IN      NS      f.gtld-servers.net.
com.                    172800  IN      NS      j.gtld-servers.net.
com.                    172800  IN      NS      k.gtld-servers.net.
com.                    172800  IN      NS      e.gtld-servers.net.
com.                    172800  IN      NS      m.gtld-servers.net.
;; Received 467 bytes from 128.63.2.53#53(H.ROOT-SERVERS.NET) in 273 ms

tradeloop.com.          172800  IN      NS      auth01.ns.harvard.net.
tradeloop.com.          172800  IN      NS      auth02.ns.harvard.net.
;; Received 123 bytes from 192.5.6.30#53(a.gtld-servers.net) in 255 ms

;; connection timed out; no servers could be reached