Lucene not indexing word files (And maybe no file)

Lucene not indexing word files (And maybe no file)- Upload a word, excel, ppt or even a text file (I think), and add a unique word in the the description and a different unique word in the file itself. The unique word in the description finds the asset, however, the unique word in the file does not. For example, this asset: ( http://www.curriki.org/xwiki/bin/view/Coll_ddanielek/WhatsOpenSource ) contains the word "fixations" but that does not find the asset when entered in search. However, the asset is indexed as its containing page is found with the search term "What's"