@ XimeX: At least I have checked that there is no mistake, I just did what is said in the readme.
But in touch with my hoster we have found the Problem, why all the tests with the hoster Domaingo and Domainfactory fail.
If i add the row
to the .htaccess all Tests show OK
But at least I don't kow why it fails without it. I don't know as much about .htaccess
@offe: if I do the test 2a with the original .htaccess (without the changes my hoster told me to do) with /api/index.php it shows "OK"
Edit:
just seen that the issue is the same as with 1und1