I have my Adobe ID and the Adobe Digital Editions. But when I download an EPUB-ebook, I don´t see the ebook or "My Digital Editions-Bibliothek".What is the solution for this problem?

how can we solve the problem?

I have my adob.e ID, downloaded Adobe Digital Editions.

Whren I download EPUB-ebooks and want to use

Digital Editions, nothing happens and appears!??

Please give me a short feedback and help