Can't find my ebook seller .

I buy my books from Kobo but it is not listed on the drop down menu when I first try to authorise ADE on my new PC.

I have tried putting in ADE in the source box and my ID and password in the other 2 boxes.

However, get a message saying can't find me despite being able to log in using the same information on the Adobe main site.

I want to be able to transfer my books bought from Kobo to my Sony E-Reader not just read them on my (not so portable) desk top PC.

Gwen.