[CentOS] Bind - zone delegation

hi all,


		i have configured a local dns master server test.com
	the same server is responsible for zone delegation for child.test.com.

But starting the named service it displays out of zone data in log file.
Same configuration works fine on centos 4.xx but the below configuration is not working on centos 5.2, 


i have attached the zone file of master server for domain test.com below, 


$TTL    86400
@       IN      SOA     test.com. root.test.com.  (
                                      1997022700 ; Serial
                                      28800      ; Refresh
                                      14400      ; Retry
                                      3600000    ; Expire
                                      86400 )    ; Minimum
                       IN      NS      test.com.
child.test.com.        IN      NS    name1.child.test.com.

101       IN      PTR     test.com.
@     IN    A    192.168.1.101
www   IN    A    192.168.1.101
name1.child.test.com. IN  A  192.168.1.222
222   IN     PTR  name1.child.test.com.
sys1  IN    A    192.168.1.220
~
~

when dig command is used reponse comes for hosts entries of test.com but not child.test.com.

Any suggestions , please help me out.
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