open a pdf in illustrator to change something

Hi I made a document with Illustrator a year ago. I saved it as a pdf. Now in the new Illustrator I try to open the old pdf to do some little text changes.
Normally you get the menu where you see the pdf and could choose the page you want to change.
If I do so and select the last page of the document, Illustrator opens the first page. Whatever I do, Illustrator shows always the first page, which page I select, the second, the third, the tenth, alsways opens the first page....

what do I wrong, or what must be done to get the right page?

bert