Issue when synchronizing KOBO with ADE 4.5 or Mac with ADE 4.5 !

As mentioned on the title of my message, my correct password and ID Adobe are rejected when trying to "synchronize/accept" my Mac with ADE (menu Help/recognize that computer) or my Kobo with ADE (peripherals/Kobo eReader/right clic/accept the peripheral). Sorry for my english, my technical terms might not be very accurate ! Thanks to help me...