http://coolping.com/fin/fsearch/search.aspx

我这个搜索有时候能搜索到内容，有时候搜索不到内容

那位能指点下是什么原因

代码：

 string filePath = CommModules.Function.PublicConfig.FilePath;
            string INDEX_STORE_PATH = filePath + "/update/Lucenes/";  

            Hits myhit = null;
            string keyword = "";
            DateTime dTime = DateTime.Now;
            IndexSearcher mysea = null;
            try
            {
                keyword = GetKeyWordsSplitBySpace(skey, new PanGuTokenizer());
                mysea = new IndexSearcher(INDEX_STORE_PATH);
                dTime = DateTime.Now;
                string[] strArrKey = { "title", "content" };
                MultiFieldQueryParser ms = new MultiFieldQueryParser(strArrKey, new PanGuAnalyzer(true));
                Query query = ms.Parse(keyword);

                myhit = mysea.Search(query);
                ssCount = myhit.Length().ToString();
            }
            catch(Exception e){
                // 写错误日志
                FinNet.CommModules.Function.AddLog.AddMsgLog(FinNet.CommModules.Function.PublicEnum.LogType.Error, skey + "搜索初始化错误", e.Message + "\r\n搜索关键字     : " + skey , e.StackTrace);
            }

出现问题是myhit.Length().ToString();为0，没有数据