Problems concerning unknown login by other devices that I created for Adobe Digital Edition

I downloaded a PDF of Toronto Notes 2014 which I bought. I downloaded the Adobe Digital Edition and creadted an account. However when I loaded the same login to Bluefire reader on my Iphone, The login was not recognized as the same login used when the pdf was downloaded. I was wondering if someone could help me reset the pdf's login info since I now can't add the pdf onto any other devices.

Thank you

Miroslav