I recieve a problem with some of the pages in a wordPress website. they are not found. Even if I try to display them from the edit page per 'show page', or how it is written in the english verseion ( in german it's 'seite ansehen' ) I get a 'page not found error.
If I use the wordpress search, I get a result, and it is the right page, but if I click at the link, I get the 'page not found' page as well.
I do not really know, where to start, to fix the problem.