Could you give me the specific URL where the SCLogin module is? I cannot find it on your page to try it out.
With that being said,
www.xxx.ch/cms/component/users/profile?layout=edit is the profile edit view in the Joomla Users Component, not a part of SCLogin. Unless SCLogin is present on that page and messing up the HTML on the page somehow, I think that it would be caused by some other extension or your template. My suggestions are to:
1. Turn Error Reporting on in the Global Configuration area to see if there are any warnings or errors that are present.
2. Try using a different template to see if the content is on that page. You can force a template on the front end by adding something &tmpl=atomic to the URL (with whatever template name that you have installed).
Let me know what you find.
-Melissa