asp网页制作预览时错误ADODB.Recordset '800a0bb9' ，求大侠指点 ADODB.Recordset '800a0bb9' 参数类型不正确，或不在可以接受的范围之内，或与其他参数冲突。 \liuyannr.asp, line 8

<%@LANGUAGE="VBSCRIPT" CODEPAGE="936"%>
<!--#include file="Connections/liuyan.asp" -->
<%
Dim nr
Dim nr_numRows Set nr = Server.CreateObject("ADODB.Recordset")
nr.ActiveConnection = MM_liuyan_STRING >>>8行 <<<<
nr.Source = "SELECT * FROM liuyan"
nr.CursorType = 0
nr.CursorLocation = 2
nr.LockType = 1
nr.Open() nr_numRows = 0
%>
<%
Dim Repeat1__numRows
Dim Repeat1__index Repeat1__numRows = 5
Repeat1__index = 0
nr_numRows = nr_numRows + Repeat1__numRows
%>
<%