DNS Disappear from Ethernet Card

[appueye]

HI friends,

I am facing an issue with my DNS Server.As i have mentioned in the title my DNS gets Disappear and following are my LAN Setting

There is a server in DMZ with 2 ethernet cards it also has a the main server for AD.
The problem is that after sometime DNS Disappear and the whole network goes down.

[Crona]

Sure i will help you with that in this case i would suggest you to to re-configure
the TCP/IP settings and i am sure it will work for you.
Edit/Delete Message

[appueye]

Sure i will help you with that in this case i would suggest you to to re-configure
the TCP/IP settings and i am sure it will work for you.

Thanks i try to do that but it didn't worked for my any other solution please.

[Bassus]

As you have mentioned in your post that you are entering DNS in both machines i would suggest you to enter in any one of the machines and it won't get disappear because i see that you DNS are getting conflicts with each other thats why your DNS are getting disappear.Try this i am sure it will work for you and windows need to have only 1 DNS on any of the machine.