Does not reverse resolve

[bind at col7.metta.lk]

Hi all,

I have managed to set up my DNS with help from you'll,
and do not find any errors in my settings and my nslookup is ok.
Thanks for all the help.

However, when someone does a lookup from outside then they get 
no reverse resolve for 

204.143.107.46 --- metta.lk
172.16.1.1     --- col7.metta.lk
172.16.2.1     --- col4.metta.lk

Dlint on my machine does not complain,
but when I use dlint from www.domtools/
then it complains of no reverse resolve.

Please let me know if you see any faults in my files 

Any advice on how to proceed from here is much appriciated.

Jacob

---------------
/etc/named.conf
---------------
options {
	directory "/var/named";
};
zone "." {
	type hint;
	file "root.cache";
};
zone "col7.metta.lk"{
	type master;
	file "col7.metta.lk";
	notify yes;
};
zone "metta.lk."{
	type master;
	file "metta.lk.";
	notify yes;
};
zone "0.0.127.IN-ADDR.ARPA"{
	type master;
	file "127.0.0";
	notify no;
};
zone "1.16.172.IN-ADDR.ARPA"{
	type master;
	file "172.16.1";
	notify yes;
};
zone "107.143.204.IN-ADDR.ARPA"{
	type master;
	file "204.143.107";
	notify yes;
};
zone "tradenetsl.lk"{
	type slave;
	file "sec/tradenetsl.lk";
	masters{
		204.143.107.34;
	};
};
zone "col4.metta.lk"{
	type master;
	file "col4.metta.lk";
	notify yes;
};
zone "2.16.172.IN-ADDR.ARPA"{
	type master;
	file "172.16.2";
	notify yes;
};

-------------------
/var/named/metta.lk
-------------------
$TTL	86400
@		IN	SOA	dhamma.metta.lk.	hostmaster.metta.lk. (
			1999100401 ; serial
			3600 ; refresh
			900 ; retry
			1209600 ; expire
			43200 ; default_ttl
			)
		IN	NS	metta.lk.
		IN	NS	tradenetsl.lk.
@		IN	MX	10	metta.lk.
dhamma		IN	A	204.143.107.46
www		IN	CNAME	metta.lk.
WWW		IN	CNAME	metta.lk.

------------------------
/var/named/col7.metta.lk
------------------------
$TTL	86400
@		IN	SOA	narada.col7.metta.lk.	hostmaster.col7.metta.lk. (
			1999100401 ; serial
			3600 ; refresh
			900 ; retry
			1209600 ; expire
			43200 ; default_ttl
			)
		IN	NS	metta.lk.
		IN	NS	tradenetsl.lk.
@		IN	A	172.16.1.1
@		IN	MX	10	metta.lk.
narada.col7.metta.lk.	IN	CNAME	col7.metta.lk.

------------------------
/var/named/col4.metta.lk
------------------------
$TTL	86400
@		IN	SOA	vajira.col4.metta.lk.  hostmaster.col4.metta.lk. (
			1999100401 ; serial
			3600 ; refresh
			900 ; retry
			1209600 ; expire
			43200 ; default_ttl
			)
		IN	NS	metta.lk.
		IN	NS	tradenetsl.lk.
@		IN	A	172.16.2.1
@		IN	MX	10	metta.lk.
vajira.col4.metta.lk.	IN	CNAME	col4.metta.lk.

====================================================
Reverse resolve files.
====================================================

-----------------------------------
/var/named/107.143.204.IN-ADDR.ARPA
-----------------------------------
$TTL	86400
@		IN	SOA	dhamma.metta.lk.	hostmaster.metta.lk. (
			1999100401 ; serial
			3600 ; refresh
			900 ; retry
			1209600 ; expire
			43200 ; default_ttl
			)
		IN	NS	metta.lk.
		IN	NS	tradenetsl.lk
46		IN	PTR	dhamma.metta.lk.


------------------------
/var/named/1.16.172.IN-ADDR.ARPA
------------------------
$TTL	86400
@		IN	SOA	narada.col7.metta.lk.	hostmaster.col7.metta.lk. (
			1999100401 ; serial
			3600 ; refresh
			900 ; retry
			1209600 ; expire
			43200 ; default_ttl
			)
		IN	NS	metta.lk.
		IN	NS	tradenetsl.lk.
1		IN	PTR	col7.metta.lk.

-------------------------------
/var/named/2.16.172.IN-ADDR.ARPA
--------------------------------
$TTL	86400
@		IN	SOA	vajira.col4.metta.lk. hostmaster.col4.metta.lk. (
			1999100401 ; serial
			3600 ; refresh
			900 ; retry
			1209600 ; expire
			43200 ; default_ttl
			)
		IN	NS	metta.lk.
		IN	NS	tradenetsl.lk.
1		IN	PTR	col4.metta.lk.

-------------------
/var/named/0.0.127.IN-ADDR.ARPA
-------------------
$TTL	86400
@		IN	SOA	dhamma.metta.lk.	hostmaster.metta.lk. (
			1999100401 ; serial
			3600 ; refresh
			900 ; retry
			1209600 ; expire
			43200 ; default_ttl
			)
		IN	NS	metta.lk.
		IN	NS	tradenetsl.lk.
1		IN	PTR	localhost.