Reverse Lookup Failed

[Oche Satriani <oche_(_at_)_its_(_dot_)_ac_(_dot_)_id>]

I have setup DNS and i take an example from the OpenBSD FAQ

it's working but my only problem is when i reverse lookup my ip number

# nslookup 202.154.62.76

note: in my /etc/resolv.conf i'm using my ISP name server

failed to reverse lookup

but ;

# nslookup 202.154.62.76 202.154.62.76

works