Cannot connect to ECS Single Node via S3

Hi Guys,

i successfully installed ECS Single Node a few weeks ago, but there is a huge Problem, which i just cant seem to figure out.

When i try to connect with s3browser, or Cyberduck, it throws an exception, telling me, that the arguments or doctypes are incorrect.

I entered the Endpoint (only the ip, since it seems that is all the two tools need), The Access Key ID (which as far as i can tell is simply the created User in step 2 Python Script), as well as the secret key, but i keep getting exceptions.

S3Browser tells me:

Unable to perform requested Action:

Getting buckets list...

Server Response:

System.Xml.XmlException: Eunexpected Token "doctype". Expected was the token "DOCTYPE", Row 1, Position 3.

Cyberduck tells me:

Expected XML document response from s3 but received content type text/html; charset=utf-8.

Any help on this one?