Adobe Degital

Hi All

We have created and ePub3 accessible file and validated the same using the latest ePub checker but the in the  Mac OS voice-over is not working in ADE. The navigation panel is read but when we go to the body content we get the Frame 0 being repeated. Do we need to change anything in the opf metadata to get this working for your reference see screen shot. Any advise on this will be very helpful, thanks in advance.