我的这段代码错误,数据无法添加记录,请高手帮忙改一下,谢谢

<%
set conn=server.createobject("adodb.connection")
conn.open "driver={microsoft access driver (*.mdb)};dbq="&server.mappath("data/guestbook.mdb")
name=request.form("name")
tel=request.form("tel")
message=request.form("message")
exec="insert into guestbook(name,tel,message)s('"+name+"',"+tel+",'"+message+"')"
conn.execute exec
conn.close
set conn=nothing
response.write "记录添加成功!"
%>