E_ADEPT_CORE_USER_NOT_ACTIVATED .

My tolio ereader accepts my adobe ID, and tells me that I can read DRM protected Books. But wheN I try to read the book, a new missage appears telling me that the  ID number  doesn¨'t catch with the  given number.  Missage: E_ADEPT_CORE_USER_NOT_ACTIVATED . This one and  again. I`m desesperated