I'm trying to link my mom's new Sony Ereader to Adobe Digital Editions on my computer (as I will be the one downloading the books for her). The wi-fi and Ereader set up is all completed... but I can't get ADE to recognize the new Ereader. I had no trouble adding my Sony (PRS-650) last year. Has anyone encountered this problem? Or am I missing something completely blatant?!! Thx!