Hello,
the current robots.txt
http://www.grossedamenschuhe.de/robots.txt does not block at all URLs of your website like this one
http://www.grossedamenschuhe.de/1000-damenschuhe-grosse-groessen-pailletten so it is not possible.
My ideas:
1. The robots.txt has been modified and the oldest version was blocking this URLs but Google has still not refreshed it
2. There is a firewall or something else blocking Googlebot
3. It's a falut of Google Webmasters Tools
PS: please use this forum only if there are questions related to the JSitemap component, to not be out of topic with personal issues
thank you