I need help signing into Digital Editions. I changed my Adobe password and signed in and it worked. Then tried to sign in to DE and it wouldn't acccept my password. Help?

I am trying to download and open up DE so that I can download a Kobo pdf book.

In doing so, I signed into Adobe and changed my password and it worked and I was signed into Adobe.

I then downloaded the DE onto my Macbook OSX and tried to sign in but it keeps saying it has some type of error and the password won't work.

I need help please!

Thank you!!