I have installed the module "K2 Tools". I tried to get it working with "Archive Mode".
The module is shown at the left position of my site:

fuassboi-in-ndb.de
Joomla: 2.5.6
K2: 2.5.7

The module shows 2 links containing the count of existing articles within June and July.
Clicking on the links should show these articles but it doesn't.

There content area keeps empty with except the lines and navigation links.
Where is my content ?

Please help.

Hi. Probably something is wrong with your template. Please ensure that you have not messed the generic.php.

What do you mean with generic.php ?
Which php do you mean ?

Your answer is not very useful.

My answer would be more useful if you had read the documentation first. getk2.org/documentation/tutorials/item/174-templating-with-k2-and-the-concepts-of-sub-templates

O.K.
I have done everything what's in that docu.
Everything is working as described.

But at all, the content area keeps empty when looking into the Archive from K2 Tools.
Sorry for making you angry, but your post was absolutely unknown to me.

You didn't make me angry. But you need to read the documentation or search the forums before posting a new question. Regarding your issue, go to K2 parameters and look for the section "Layout & view options for Search & Date listings". Set the desired settings and then hit save. This should solve your issue.

Very nice, thank you very much.
This solved the problem.

You are welcome.