Change account for ebook

Hello, I bought a .acsm ebook, then I connect with my computer on Adobe Digital Editions without Id, I was able to open it and was happy. Then I wanted to read it on my phone with an ebook reader that asked me to connect with an AdobeID so I did but then it told me that the product was already associated with another account. So I unauthorized my computer to let my phone read the file but it did not work. Now I can not read it from anywhere and I don't know what to do to link the ebook with my AdobeID.