keynote widget wrong build in order

I am using Keynote 09. My prensentation has nore slides but I am using 2 slides to describe my problem. First slide, build in order is Audio, Text, Text and hraphic. Second slide build in order is Audio, Text and graphic. When play on Keynote in iMac, the order is correct. But, once I add it to iBook Author's Keynote widget and preview it on an iPad, the Audio in slide 2 did not play first but last. Anyone encountered this issue?