I still can see that your server doesn't respond to our requests:
wget -S --timeout=5 simple-quality.de
--2014-11-03 20:26:53-- http://simple-quality.de/
Resolving simple-quality.de (simple-quality.de)... 22.214.171.124
Connecting to simple-quality.de (simple-quality.de)|126.96.36.199|:80... failed: Operation timed out.
You need to talk about this with your hosting provider, if they are not able to solve it, you may use cloudflare, so we will grab your original content from cloudflare servers, or you may consider changing your hosting.
I have also tried from a different server from the same network and different IP address and it worked, so I think that it is related to IP address only.