Lucene.net problem with wildcard search

//  var analyzer = new KeywordAnalyzer();
//  var analyzer = new WhitespaceAnalyzer(luceneVersion);
    var analyzer = new SimpleAnalyzer(luceneVersion);
//  var analyzer = new StandardAnalyzer(luceneVersion);

   var filenameQuery = new WildcardQuery(new Term(DocProp.Filename, "*" + SearchFor.ToLowerInvariant() ));
        filenameQuery.Boost = 2.0f;
        var filenameQuery2 = new WildcardQuery(new Term(DocProp.Filename,  SearchFor.ToLowerInvariant()+"*"  ));
        filenameQuery2.Boost = 2.0f;
        var filenameQuery3 = new WildcardQuery(new Term(DocProp.Filename,"*"+  SearchFor.ToLowerInvariant()+"*"  ));
        filenameQuery3.Boost = 2.0f;
        var filenameQuery4 = new TermQuery(new Term(DocProp.Filename,  SearchFor.ToLowerInvariant()  ));
        filenameQuery4.Boost = 2.0f;
        
        var filePathQuery = new TermQuery(new Term(DocProp.Path,   SearchFor.ToLowerInvariant()  ));
        
        var contentQuery = new TermQuery(new Term(DocProp.Content ,  SearchFor.ToLowerInvariant()));
        var query = new BooleanQuery();
        query.Add(filenameQuery,Occur.SHOULD);
        query.Add(filenameQuery2,Occur.SHOULD);
        query.Add(filenameQuery3,Occur.SHOULD);
        query.Add(filenameQuery4,Occur.SHOULD);
        query.Add(filePathQuery,Occur.SHOULD);
        query.Add(contentQuery,Occur.SHOULD);