Can't transfer my ebooks to my nook get error msg E_ACT_TOO_MANY_ACTIVATIONS - Activation limit exceeded worked fine 2 weeks ago.

Can't get my ebooks to transfer over to my Nook.  reoccurring problem worked 2 weeks ago  Got this error msg

E_ACT_TOO_MANY_ACTIVATIONS - Activation limit exceeded  Previously I have gotten it fixed with a remote chat from Adobe today no help from them.