现在是出现以下问题，请教大家
----------------------------------------------------------------
错误类型：
Microsoft OLE DB Provider for ODBC Drivers (0x80040E21)
/text/index.asp, 第 5 行
--------------------------------------------------------以下是1-15 那段代码


<% set rs3=server.createobject("adodb.recordset")
sql="select * from job"
rs3.open sql,conn3,1,1
r1=rs3.recordcount
rs3.close
set rs3=nothing
set rs3=server.createobject("adodb.recordset")
sql="select * from job order by id desc"
rs3.open sql,conn3,1,1
jobnum=rs3.recordcount %>
<% dim a
a=request.querystring("a")
%>