生化危机7弹药合成:asp问题：错误类型：(0x80020009)发生意外。/xinwen/fastsave.asp, 第 160 行。啥办？

set rs = server.CreateObject ("Adodb.recordset")
sql="select * from class where classid="& cstr(request("classid"))
rs.open sql,conn,1,1
count=rs("classNum")+1
rs.close
sql="update class set classNum="&count&" where classid="&cstr(request("classid"))
conn.execute(sql)

set rs = server.CreateObject ("Adodb.recordset")
sql="select * from board where boardid="& cstr(request("boardid"))
rs.open sql,conn,1,1
count1=rs("boardNum")+1
rs.close
sql="update board set boardNum="&count1&" where boardid="&cstr(request("boardid"))
conn.execute(sql)

username=admin
set rs = server.CreateObject ("Adodb.recordset")
rs.Open "Select * From users where username='" &username&"'", conn, 3,3
'sql="select * from users where username= "& trim(session("username"))
'rs.open sql,conn,1,1
count2=rs("articleNum")+1
rs.close
sql="update users set articleNum="&count2&" where username='" &username&"'"
conn.execute(sql)

end if
end if
%>