3dcg制作软件:为什么出现：错误类型：(0x80020009)发生意外。/Default.asp, 第 19 行

我的代码如下：
＜html＞
＜head＞
＜title＞Sample＜/title＞
＜/head＞
＜% dim conn,fs,f
Set conn = Server.CreateObject("ADODB.Connection")
conn.open "driver={Microsoft Access Driver (*.mdb)};uid=;pwd=kxj;dbq="&server.mappath("id.mdb")
set fs=server.createObject("scripting.filesystemobject")
testDrive=Server.MapPath("/DRIVEINFO.ASP")
'通过MapPath获得当前盘盘符
testDrive=Left(testDrive,3)
set f=fs.getdrive(testDrive)
'调用GetDrive方法，将驱动器赋予一个变量
Mysql="SELECT * From driveinfo where id=1"
set rsCheck = Server.CreateObject("ADODB.Recordset")
rsCheck.open Mysql,conn,1,1
FSER=trim(f.serialnumber)
'获得当前盘序列号
StrSerno=trim(rsCheck.fields("SERNO"))
StrMark=rsCheck.fields("WRIMARK")
if StrSerno＜＞FSER and StrMark=0 then
'若是首次安装，则置写盘标志为1
session("pass")=true
'定义用户Session，并置为全局ASP文档标识变量
set rsMain = Server.CreateObject("ADODB.Recordset")
Mysql1="update driveinfo SET SERNO="&FSER&", WRIMARK=1"
rsMain.open Mysql1,conn,1,2
response.write("＜a href='success.asp'＞SETUP
SUCCESSFUL!WELCOME TO ACCESS THE WEBSITE!＜/a＞")
set rsMain=nothing
else
if StrSerno=FSER then
'若是合法用户再次合法进入
session("pass")=true
response.write("＜a href='success.asp'＞YOU ARE AUTHORIZED BY THE WEBSITE MANAGER，WELCOME TO ACCESS !＜/a＞")
else
'非法拷贝用户
session("pass")=false
response.write("＜a href='fail.htm'＞IT IS ILLEGAL TO COPY THE WEBSITE'S ASP DOCUMENT.YOU ARE NOT RIGRT TO USE THE PROGRAM.＜/a＞")
end if
end if
response.write("＜br＞")
response.write("Volume Serial Number in drive "&testDrive)
response.write(f.serialnumber)
response.write("＜br＞")
response.write("Volume hex Serial Number in drive "&testDrive)
response.write(hex(f.serialnumber))
response.write("＜br＞")
'作为演示，本程序把当前盘序列号列出来(16进制)
set f=nothing
set fs=nothing
%＞
＜/html＞

麻烦各位大虾指教一下，谢谢！