Adobe ID for other aplication

Hello:

I install Adobe Digital Editions in my computer. And there I can read my eBooks.

But i want to read my eBooks in a Tablet. I install two different apps in my tablet. And they ask for me the Adobe ID.

When I try to sign in, both apps say: "failed to sign in" or "error".

I readon a websitethat I can readebookson up to 6devices.

I try to use the apss Tradeit and Ebooki in a tablet AOC Breeze.

Thanks