CentOS 5.3 BIND and nslookup

[xeeon]

Hello guys!
I have a problem. Don't work nslookup from clients guest OS

I have LinuxMint 7 and I'm installed VirtualBox on her. I created three guests OS. Two CentOS and XP
Name
The first CentOS linux1.starline.ca (in the ending "ca" I need use a point? I didn't use) Example linux1.starline.ca.
The second CentOS centos.starline.ca
The third XP xp2.starline.ca
On the first CentOS(linux1.starline.ca) I installed BIND and graphical utility for use BIND(system-config-bind)
Created zone starline.ca.
Record SOA
In the line Authoritative Name Server I wrote linux1.starline.ca.
Record NS
In the line Domin Name write starline.ca. (I can't change that)
In the line Sever Domin Name I wrote linux.starline.ca.
Crated record A
In the line Domin Name I wrote linux1.starline.ca.
IP 168.135.88.2
have a tick Create Reverse Mapping Record
Created record A
В строке Domin Name I wrote centos.starline.ca.
IP 168.135.88.100
have a tick Create Reverse Mapping Record
Created record A
In the line Domin Name I wrote xp2.starline.ca.
IP 168.135.88.20
have a tick Create Reverse Mapping Record
Launch BIND (on linux1.starline.ca.)
Ping working on all guest OS
nslookup working only on the Server
Example: nslookup linux1.starline.ca
Server :168.135.88.2
Address: 168.135.88.2#53
Name: linux1.starline.ca.
Address: 168.135.88.2
On the clients guest OS nslookup don't work. It write : timed out; no servers could be reached
Why nslookup don't work from clients guest OS?
I hope you understand my question

[rcgreen]

This will depend on how each guest OS obtains its IP address
and nameserver address. Go into each OS and check the file
/etc/resolv.conf This is the address that nslookup will query.

I know nothing about virtual machines, so I can't tell how they
get the address.

[xeeon]

The problem is solved successfully! Is working! The Firewall in the CentOS blocks for default port 53/tcp,upd. Need in the Firewall makes exception for port 53/tcp,upd.