急! 相对路径和虚拟路径

数据库在admin下!
这是我的连接数据库的代码
大家帮我看看啊!

<%

db=server.mappath("/admin/db2.mdb")
Set conn = Server.CreateObject("ADODB.Connection")
connstr="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & db
conn.Open connstr

dim gs,sql
gs = Trim(request.Form("gs"))
sql ="select top1 * from gs order by id desc"
set rs=server.CreateObject("ADODB.recordset")
rs.open sql,conn,1,3

%>

<%=rs.fields("content")

%>
<%
conn.close
rs.close
set rs=nothing
set conn=nothing

%>