ADS connection problems

I am trying to use ADS for authentication and i have strange problems.

It works fine for a few days and then it stopped working and has connection problems.

So first i have questions to solve maybe my problems:

I found this in the Open-E Knowledgebase:

There are no special settings you need to do. You need to sync with the ADS using Open-E GUI (Configuration->NAS resources) and chose the ADS option. Then, enter the realm (Domain+user) KDC IP and administrative account username and password.

I don't understand the realm definition. Domain+user???? Which user? Can someone show me an example?
Our realm is "ims.ea". I think ....

In my logs i found this:

kerberos_kinit_password ULTRIX$@IMS.EA failed: Preauthentication failed

It is correct to disable kerberos preauthentication on ADS server side for my administrative user (only)???

But my main problem is this:

Database is empty or connection error!

I see this when i am trying to start or restart the authentication method. It was working several days fine and now it does not work again ....

May I ask if you have set DNS address to be your ADS IP?

Yes. I take the ADS IP.

One more info: I am using 6.0up95.8102.6059 64bit.

Here is an article with most common problems with connecting to ADS:

http://kb.open-e.com/Problems-connec...ctory_115.html

Please let us know if it helps you. If it does not solve the issue please open a support ticket via user portal and we will be more that happy to help you via remote support session.

We are using Windows 2008R2 .... i will check it next week.