[SOLVED] Problems with ChildTheme Montezuma and uploads writable

Hi!
I installed Montezuma on my test blog because I need a new design for my blog. Set the wp-content/uploads folder to writable and create a child theme.
Now I can't change the CSS within the child them and in the html code on the website there ist:

YOu can have a look http://test.sportwetten-blogger.de Username & Password is test

edit: Got it! Need to make theme folder writable! Also I don't need a child theme.