ADO.NET调试：OleDBCommand增加数据失败

[fountain521]

我机器上的版本是1.1，报错是cmd.executereader()这句。最好讲一下原理。
另问script 里面注释掉一行的符号（注释符）是什么？
<script language=vb runat=server>
sub button1_c(sender as object,e as eventargs)
step1.visible=false
dim rd as oledbdatareader
dim conn as oledbconnection = nothing
dim connstr,sql as string
connstr = "provider=microsoft.jet.oledb.4.0;data source=" & server.mappath

("day.mdb")
conn = new oledbconnection(connstr)
conn.open()
sql= "insert into daya (datea,weather,title,body) values (#"& request.querystring

("date1") &"#,'"& textbox2.text &"','"& textbox1.text &"','"& textbox3.text &"')"
dim cmd as oledbcommand = new oledbcommand(sql,conn)
cmd.executereader()
conn.close()
end sub
</script>