ASP添加记录程序运行错误

 想通过index.asp的表单输入值提交后直接添加进数据文件里,表单有学号和姓名两个项方法为post,action="add.asp",conn.asp的内容为
_<%
constr="DBQ="&server.mappath("xmy.mdb")&";driver={microsoft access driver (*.mdb)}"
set db=server.createobject("adodb.connection")
db.open constr
%>
_
以下为add.asp程序里的内容

<!--#include file="conn.asp"-->
<%
  dim strXH,strXM,strCW,strxh,strxm,strbl
  strXH="您忘记填写学号,请填写学号。"
  strXM="您忘记填写姓名,请填写姓名。"
  strCW="出现未知错误"
  strxh=trim(request.form("xh"))
  strxm=trim(request.form("xm"))

  strbl=0
  If strxh="" Then
    response.Redirect("index.asp?ErrorMessage="&strXH)
    strbl=1
  End If

  If strxm="" Then
    response.Redirect("index.asp?ErrorMessage="&strXM)
    strbl=1
  End If

  If strbl=0 Then
    set rs=server.createobject("adodb.recordset")
    insertsql="select * from sushe"
    rs.open insertsql,db,1,3
    rs.addnew

    rs("xuehao")=strxh
    rs("xingming")=strxm

    rs.update

    rs.close
    set rs=nothing

    Response.Redirect("xinxi.asp")

  Else
    Response.Redirect("index.asp?ErrorMessage="&strCW)
  End If

%>

add.asp运行错误,不知错在哪里,刚学ASP请各位大佬指教

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哪行出错,报什么错也没说,谁知道哪里出错。。如果是iis7+需要配置过iis才能显示具体错误

iis7+ asp如何显示具体错误信息

抱歉疏忽了没把问题写清楚
IIS没有提示哪行出错,打开页面浏览器显示错误为:
An error occurred on the server when processing the URL. Please contact the system administrator.
If you are the system administrator please click here to find out more about this error.