named doesn't ask second DNS

[Dmitry Alyabyev]

Howdy

Something strange happens with one of my DNS and I hope to listen
suggestions from DNS-gurus.

The target domain has two NS records:
        IN NS   dns2.mydomain
        IN NS   dns.domain

And when dns2.mydomain isn't autoritative for the target domain I have
the strange sutiation - when I try to retrieve any record except
NS for a target domain, my DNS (8.2.3-REL, FreeBSD) failed to respond:

$ nslookup -q=mx domain
  * Timeout *
$ nslookup -q=soa domain
  * Timeout *

$ nslookup -q=mx domain dns2.mydomain
  * That's all right *
$ nslookup -q=soa domain dns2.mydomain
  * That's all right too *

All name servers have named 8.2.3 (last time update from tarball) and
run correctly (as for me). 

The corresponding part of cache dump is following:
domain 145615  IN      NS      dns2.mydomain.        ;Cr=addtnl LAME=13 [213.177.194.5]
       145615  IN      NS      dns.domain.    ;Cr=addtnl [213.177.194.5]
       2463    IN      SOA     dns.domain. hostmaster.domain. (
                2001012600 28800 3600 604800 3600 )     ;Cr=answer [x.x.x.x]
;      2490    IN      A       dns.domain. hostmaster.domain. (
;               2001012600 28800 3600 604800 3600 )
;domain.;NODATA ;-$
;Cr=answer [x.x.x.x]

... where x.x.x.x is IP of my dns2.mydomain

What could be the source the problem ? Where I can look into ?
Any ideas are welcome.

Hope to your help,
--
Dimitry