LuceneIndexer is not working

Hello All,
  I am using slide2.1, and now want to attach lucene. I
enable the
lucene in slide but indexes are not generated. Exceptions is
coming
 while using LuceneIndexer.
   
  Does LuceneIndexer not work in Slide2.1. If not then how
can i use Indexer to search resources?
  <ContentIndexer
class="org.apache.slide.index.LuceneIndexer">
  ...........
  </ContentIndexer>
   
  Help Plz.


 				
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Answers