win 7下连接sql问题

代码如下：
<!--#include file="ADOVBS.inc"-->
<%
set conn=Server.CreateObject("ADODB.Connection")

conn.Open "Provider=SQLoledb;data source=YAO;UID=;PWD=;Initial Catalog=rainbow;Integrated Security=SSPI"
Set bkgd= Server.CreateObject("ADODB.Recordset")
bkgd.open "SELECT * FROM Userinfo WHERE code='"&Session("name1")&"'",conn,AdOpenDynamic,adLockOptimistic

'set conn=server.createobject("adodb.connection")
'conn.open "driver={microsoft access driver (*.mdb)};dbq="&server.mappath("data/photo.mdb")
%>
可是提示：
Microsoft OLE DB Provider for SQL Server '80040e4d'

用户 'YAO\YAOPENG' 登录失败。

\conn.asp, line 5
请教是什么原因