PLS HLP! epub3 upload error msg, caused by trying to rectify video fallback error msg?

Hi,

I am trying to upload an epub3 to apple ibooks, and i keep receiving this message:

1 package(s) were not uploaded because they had problems:

/Users/seaward/Music/iTunes Producer/Wooden_Man.itmsp - Error Messages:

ERROR ITMS-9001: "WOODEN_MAN.epub : WOODEN_MAN_NEW-2.xhtml : Bad_Character_Found_in_XML_File:WOODEN_MAN_NEW-2.xhtml, Line:17, CodePoint Index:39, SAXParseException Column:38 CodePoint Hex:U+6E, Prefix:_idAudio001" autoplay co" at Book

ERROR ITMS-9000: "No OPF XML" at Book

Here is the code it is referring to:

line 17:

<audio id="_idAudio001" autoplay controls>

Strangely, this error only presents itself once I try and rectify a previous video fallback error, by adding the fallback code here on line 412:

<source src="video/WOODEN_MAN.mp4" type="video/mp4" />

<strong class="fallback-message">This device cannot play video.</strong>

Which gets rid of the fallback error, but created the new error as shown above.

Does anyone have any clue as to how i can rectify and why it is happening?

Thanks!