Configure PHPStorm 3 and Xampp

Hello all
I am using PHPStorm 3 for the first time so I require your guidance. I am using the version 111.119.
I want to configure phpstorm 3 and xampp and I also want to test the debugging.
When I try to do so, I get the following message on my screen:

As you can see above when I press ok the debugging server is no more selected. I did not raised it from the phpunit test file but from the project directory.
Any help to fix this issue will be highly appreciated.
Kindest regards
Tom
