使用asp查找后分页显示，第一页正常，在点击下一页时就出错? 400 报错

代码如下：

<%
   set rs=server.createobject("adodb.recordset")
    
   cz=request("search")  '0为查找，不带search为全部显示列表没   
   xb=request.Form("xingb")
   xm=request.form("rcsearch")

   if cz="0" then
    if xm="" then
    if xb="noxz" then
     sql="select * from jyknry order by fbrq desc"
    else
      if request.Form("xingb")="1" then
     sql="select * from jyknry where xingbie='男'" & "order by fbrq desc"
     else
      if xb="2" then
      sql="select * from jyknry where xingbie='女'" & "order by fbrq desc"
     else

      '错误在这？？？？？？？？？？？？？？？？

      'if request.Form("xingb")="" then
      'sql="select * from jyknry where xingbie='女'" & "order by fbrq desc"
      'end if
     end if
     end if   
    end if
   
   
    else
    '查询名字存在
      if xb="noxz" then
    sql="select * from jyknry where xingming = '"& xm &"' "
   else
    if xb="1" then
      sql="select * from jyknry where xingming = '"& xm &"' and xingbie='男' "  & "order by fbrq desc"
    else
      sql="select * from jyknry where xingming = '"& xm &"' and xingbie='女' " & "order by fbrq desc"
    end if
    
   end if

  
    end if
 
 
    
   else 
  
      
     '不属于查询，就业困难人员全部列表         
      sql="select * from jyknry  order by fbrq desc "
    
 end if
 rs.open sql,cn,3,1
%>