setting up bind

[joy <gracecott@sancharnet.in>]

Hi everyone,

Sorry for the long post , but I don't think I could've done it in less.....
I'm trying to setup a name server using bind 9 and have run into a 
peculiar problem:

The computers on my lan have hostnames like xxx.pcm.com and this 
nameserver is an internal one to
serve these machines.
so i wrote a zone for "pcm.com" and made my server the master for the zone.
the records look somthing like this:
xxx.pcm.com   IN   A   192.xx.xx.xx  (is this right?)

to test it ,I ran dig  for one of the hostnames and it appears that 
there is already a master for pcm.com somewhere else
which  (obviously) does not have a record for my machine.
To make my machine not query other nameservers, I made my nameserver the 
only one in resolv.conf.
and  made it a slave for queries on zone "com"  with the main NS outside 
as the master.
however this causes dig to give a timed out error.

Am I missing something here?

What I feel is that dig first tries to resolve  "."  (root)zone and is 
not able to because my NS does not hold any info on it.
Am I right in thinking so?

My  NS had  a different hostname before and  dig  could return a valid  
ip.However, my employer insists
that the  hostnames end with pcm.com (for  some administrtive reasons )

So, my question is,
how do I make dig search for xxx.pcm.com on my NS before forwarding it 
to the outside?

Also,
Do I need to to write the  PTR records for every A  record I add?

Thanx (a lot ) in advance,
Joy.M.M