Hi niclasto,
the plugin works for thousands of other users. Let’s try to figure out why you are having an issue.
I visited your site, but did not see any pages that have been configured for SyndicatePress. You will need to add and publish a page with the sp shortcode in it to display the feeds you add… To get started, you can use the most basic [sp# all] in a page. Put the news feed urls into the SP admin panel ‘RSS Feeds’ tab.
Please provide the SyndicatePress configuration settings and link to the page which will be displaying the SP feed content.
You can export your SP settings on the SyndicatePress admin panel in the Export section of the ‘Support’ tab. Copy the settings and paste them into this thread.
Best regards,
SP Developer