TYPO3 Core

I'm using the extbase and fluidbased indexed_search plugin, which works fine, but i'm just not able to use my proper template.

I tried all the ways in the constants, in the setup and the pathes i added work fine for other extensions. But nothing happend, always the same template. Even the Typoscript Object Browser shows me the correct path.

In the end i tried changing the template path in the constants.txt of the indexed_search itself, and not even that lead to the usage of my template.

Anybody else has the same problem? At the moment, the only possibility is to change the template in the CORE, what's pretty frustrating.