iPad "Unexpected Error" message.

Just upgraded to a new iPad using iOS 7 using same Adobe account and Overdrive. New iPad won't download books. I get the message "Unexpected Error: An error occurred, please try again.  If this error persists, return to your library's website and download this title again".

Did this - didn't work. Also tried deleting and re-installing app and rebooted iPad as we'll. Even tried a different iPad (IOS 7) and have the same issue. No issues with my old iPad on IOS5 - everything works fine. 

Help!!!