Unable to erase authorization

so I can no longer download books from the library.  it says that I have an authorization issue???   I have reset my password and still it says that I can not erase authorization to reload this.  What do I do now?  I have been in tough with Adobe on several occassions, and now they tell me this forum is the only place that I can get answers.  I don't know why this is so dififcult.  I have been two weeks between the library and adobe trying to resolve this...