transferring changes made to referrences into existing footnotes word 2008 (mac, endnote x2)

I made a spelling mistake when creating an endnote reference. i did not realise this spelling mistake in the title until i completed my work on a document in word 2008. now i corrected the mistake, but in the word 2008 document still the older wrong version is used in the footnotes. how can i make word 2008 automatically adapt the changes made to endnote references?