Question : dns snap-in not working

Hi experts
I am having problems with my DNS server
My server is a windows server 2003 standard edition sp2

I cannot open the DNS snap-in when I try I receive the error
MMC cannot create the snap-in

I have run
ipconfig /flushdns & ipconfig /registerdns.
 dcdiag , dcdiag /v, dcdiag /fix
 dcdiag /test:dns
here is the results from the test dns
Domain Controller Diagnosis

Performing initial setup:
   Done gathering initial info.

Doing initial required tests
   
   Testing server: Default-First-Site-Name\SERVER1
      Starting test: Connectivity
         ......................... SERVER1 passed test Connectivity

Doing primary tests
   
   Testing server: Default-First-Site-Name\SERVER1

DNS Tests are running and not hung. Please wait a few minutes...
   
   Running partition tests on : ForestDnsZones
   
   Running partition tests on : DomainDnsZones
   
   Running partition tests on : Schema
   
   Running partition tests on : Configuration
   
   Running partition tests on : domain
   
   Running enterprise tests on : domain.local
      Starting test: DNS
         Test results for domain controllers:
           
            DC: server1.domain.local
            Domain: domain.local

                 
               TEST: Forwarders/Root hints (Forw)
                  Error: Forwarders list has invalid forwarder: 10.10.1.220 ()
         
         Summary of test results for DNS servers used by the above domain controllers:

            DNS server: 10.10.1.220 ()
               1 test failure on this DNS server
               This is not a valid DNS server. PTR record query for the 1.0.0.127.in-addr.arpa. failed on the DNS server 10.10.1.220
               
         Summary of DNS test results:
         
                                            Auth Basc Forw Del  Dyn  RReg Ext  
               ________________________________________________________________
            Domain: domain.local
               server1                   PASS PASS FAIL PASS PASS PASS n/a  
         
         ......................... domain.local failed test DNS





and here's an ipconfig
 
 Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : HP NC7781 Gigabit Server Adapter
   Physical Address. . . . . . . . . : 00-14-C2-5B-C3-6B
   DHCP Enabled. . . . . . . . . . . : No
   IP Address. . . . . . . . . . . . : 192.168.10.200
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Default Gateway . . . . . . . . . : 192.168.10.254
 DNS Servers . . . . . . . . . . . : 192.168.10.200


This is the only server in the domain
It runs as a DC and exchange
Anyone have any idea how to fix this

thanks

Answer : dns snap-in not working

WindowsKey+R
mmc.exe <enter>
ALT+F
M
ALT+D
select DNS
ok
ok