Error: Too few Parameters

I got this error Too few parameters. expected 3 from the folowwing query:

Set MyConn=Server.CreateObject("ADODB.Connection")
MyConn.Open "Driver={Microsoft Access Driver (*.mdb)}; DBQ=" & Server.Mappath("../../db/articles.mdb")
        sql = "Select * FROM Articles Where Art_Section.Articles = " & RS1("Art_Section") & " AND Issue_Nr=" & RS0("Cur_Issue") & ""
        set rs2 = MyConn.Execute(Sql)

Both RS1 and RS0 are triggered correctly. When ggogle it, I found that this error is caused by "empty fields in the db", which is not the case.

Basicaly, this rs 2 should find in the db all records where simultaneously Art_Section = some value AND Issue Nr = another value.

Thought of posting the whole code:

<%
Set MyConn=Server.CreateObject("ADODB.Connection")
MyConn.Open "Driver={Microsoft Access Driver (*.mdb)}; DBQ=" & Server.Mappath("../../db/cadranpolitic.mdb")
  set rs0 = MyConn.Execute ("Select Cur_Issue From Cur_Issue")
  session("cur_issue")=rs0("cur_issue")
  set rs1 = MyConn.Execute ("Select Distinct Art_Section From Articles")
  if not rs1.EOF then
 rs1.movefirst
 do
Response.Write("<H2>" & RS1("Art_Section") & "</H2>")
Response.Write("<hr>")
  set rs2 = MyConn.Execute ("Select * From Articles Where Art_Section='" & RS1("Art_Section") &"' AND Issue_Nr="& session("cur_issue") & "")
  if not rs2.EOF then
   rs2.movefirst
   do
Response.Write("<H3>" & RS2("Art_Title") & "</H3>" & "</br>")
Response.Write("<i>"&"<b>" & RS2("Art_Author") & "</b>"&"</i>" &"</br>")
Response.Write(" "& RS2("Art_Header") &"" &  "<a href=""view_article.asp?item=" & RS2("ID") &"""target=""_blank"">Articol complet...</a>"& "</br>")
Response.Write("<hr>")
    rs2.MoveNext
  loop until rs2.EOF
  end if
   response.write "</br>"
  rs1.movenext
 loop until rs1.EOF
end if
 MyConn.Close
set dbConn = Nothing
set rs1 = Nothing
set rs2 = Nothing
%>

Whell there are 2 problems with it: 1 If I try to sort records by issue_nr, it triggers the "to few parameters Error.Expect 1". If comment that, the script works but instead o response.writing the records the way I want - and it should, i guess as I select distinct them. That is, instead of:
Art_Section_1
Art_Section_1_Article_1_Title
Art_Section_1_Article_1_Author
Art_Section_1_Article_1_Header

Art_Section_1_Article_2_Title
Art_Section_1_Article_2_Author
Art_Section_1_Article_2_Header...

Art_Section_2
Art_Section_2_Article_1_Title
Art_Section_2_Article_1_Author
Art_Section_2_Article_1_Header...

It displays them totaly random...