Problem with may reverse

[Ing. Ricardo Cumberbatch L. (PANNet - URC)]

Hi everybody,

I am a newbie in this world of BIND i instal BIND 9.2.2 and got problem
with my reverse example:

$ nslookup -sil
> 168.77.x.x (my DNS ip)
Server:         168.77.x.x
Address:        168.77.x.x#53

x.x.77.168.in-addr.arpa name = my.server.

When a make a query from my DNS it response good, but when i change the
server query, example:

> server ns.dns.br
Default server: ns.dns.br
Address: 200.160.0.5#53
> 168.77.x.x
Server:         ns.dns.br
Address:        200.160.0.5#53

Non-authoritative answer:
*** Can't find x.x.77.168.in-addr.arpa.: No answer

> server ns.utp.ac.pa
Default server: ns.utp.ac.pa
Address: 168.77.1x.x#53
> 168.77.x.x
Server:         ns.utp.ac.pa
Address:        168.77.1x.x#53

** server can't find x.x.77.168.in-addr.arpa: NXDOMAIN
>

Could someone had any idea,for solution this problem, please

Thanks for all the help