[SOLVED] Wysija vs Atahualpa issue: cannot find single.php or page.ph

Hi all, thanks for reading this,

My Wysija (plugin for newsletters) confirmation page is not showing the text I entered in the settings. In stead it only shows the heading and tag [wysija_page] below. Same thing for unsubscription and account change.

The solution offered by Wysija (http://support.wysija.com/knowledgeb...?vote_down=282) does not work for me as it needs the single.php or page.ph files. I use Atahualpa and no such files are to be found.

Does anyone have a clue how I can solve this?

Thanks in advance!