竞技钓鱼比赛排名:HttpJspBase.java:133

我用的是ACCESS查询问题，
前面用的userBean，这个BEAN可以修改，但是不能显示，请帮忙！谢谢
<jsp:useBean id="con1" class="firm.firm"/>

<%

ResultSet rs23 = con1.executeQuery("select top 1 * from votes");
if(rs23.next()){
%>
<tr>
<td height="31" bgcolor="#FFFFFF"><div align="center"><%=rs23.getString("NAME") %></div></td>
</tr>
<%
}
rs23.close();
%>

BEAN信息是
public ResultSet executeQuery(String sql){
rs=null;
try{
conn = DriverManager.getConnection(sConnStr);
stmt = conn.createStatement();
rs=stmt.executeQuery(sql);
}
catch(SQLException ex){
System.err.println("aq.executeQuery: "+ex.getMessage());
}
return rs;
}

出现错误显示以下信息
exception

javax.servlet.ServletException: firm.firm.executeQuery(Ljava/lang/String;)Ljava/sql/ResultSet;
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:867)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:800)
org.apache.jsp.file.view_jsp._jspService(view_jsp.java:70)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:133)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:311)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)

root cause

java.lang.NoSuchMethodError: firm.firm.executeQuery(Ljava/lang/String;)Ljava/sql/ResultSet;
org.apache.jsp.file.view_jsp._jspService(view_jsp.java:54)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:133)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:311)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)