自制凉拌柚子皮的做法:rs.update 错误

Microsoft OLE DB Provider for ODBC Drivers 错误 '80004005'

[Microsoft][ODBC Microsoft Access Driver]行中有错误

/tp/adminpic/picadd.asp，行 25

下面是PICADD.ASP 的代码
<%
picname=request.form("picname")
picaddress=request.form("picaddress")
picadd=request.form("picadd")
tuda=request.form("tuda")
isgood=request.form("isgood")
picshuo=request.form("picshuo")
piczuozhe=request.form("piczuozhe")
if picname<>"" then
sql="select * from pic"
set rs=server.createobject("adodb.recordset")
rs.open sql,conn,1,3
rs.addnew
rs("picname")=picname
rs("picaddress")=picaddress
rs("picadd")=picadd
rs("tuda")=tuda
rs("picshuo")=picshuo
rs("isgood")=isgood
rs("piczuozhe")=piczuozhe
rs("picclass")=request.form("picclass")
rs.update 就是这里出现错误
session("username")=name
Response.write "<script>alert(""添加成功,继续添加"");location.href=""picadd.asp"";</script>"
end if
%>