solr 集成ik分词器问题

   我用的solr是1.4.1，ik分词器3.1.6 
   不加分词器已经可以正常访问http://localhost:8080/solr/admin/页面
   schema.xml 配置如下：
    <fieldType name="text" class="solr.TextField" positionIncrementGap="100">
      <analyzer type="index">
       <tokenizer class = "org.wltea.analyzer.solr.IKTokenizerFactory" isMaxWordLength="false" /> 
              <filter class="solr.StopFilterFactory" ignoreCase="true" words="stopwords.txt" enablePositionIncrements="true" />  
              <filter class="solr.WordDelimiterFilterFactory" generateWordParts="1" generateNumberParts="1" catenateWords="1" catenateNumbers="1" catenateAll="0" splitOnCaseChange="1" />                 <filter class="solr.LowerCaseFilterFactory" />  
                 <filter class="solr.EnglishPorterFilterFactory" protected="protwords.txt" />                 <filter class="solr.RemoveDuplicatesTokenFilterFactory" />  
      </analyzer>
      <analyzer type="query">
       <tokenizer class = "org.wltea.analyzer.solr.IKTokenizerFactory" isMaxWordLength="true" />  
       <filter class="solr.SynonymFilterFactory" synonyms="synonyms.txt" ignoreCase="true" expand="true" />  
                 <filter class="solr.StopFilterFactory" ignoreCase="true" words="stopwords.txt" />  
                <filter class="solr.WordDelimiterFilterFactory" generateWordParts="1" generateNumberParts="1" catenateWords="0" catenateNumbers="0" catenateAll="0" splitOnCaseChange="1" />  
                 <filter class="solr.LowerCaseFilterFactory" />  
                 <filter class="solr.EnglishPorterFilterFactory" protected="protwords.txt" />  
                 <filter class="solr.RemoveDuplicatesTokenFilterFactory" />  
      </analyzer>
    </fieldType>
      加了分词器后报错如下：
      严重: java.lang.AbstractMethodError: org.wltea.analyzer.solr.IKTokenizerFactory.
create(Ljava/io/Reader;)Lorg/apache/lucene/analysis/Tokenizer;
        at org.apache.solr.analysis.TokenizerChain.getStream(TokenizerChain.java
:69)
        at org.apache.solr.analysis.SolrAnalyzer.reusableTokenStream(SolrAnalyze
r.java:74)
     望用过solr的同仁帮忙看看，谢谢了