I am not able to download an ebook to my PC. I have windows 7 x64. I get a "Check Activation" error. The question is that I have 2 Adobe users. I have the ebooks associated to one of them but every time I download Adobe Digital Editions, independently from what user I download it, it always create the Adobe Digital Editions associated to the worng user. If I try to delete the Authoritation it says that it is nor posible and recommneds me to try later, but I never get it.