asp-db problem

hey i'm using vb for this application. When i try to request "terug" he says:

ADODB.Recordset (0x800A0CB3)
Bijwerken wordt door de huidige verzameling records niet ondersteund. Dit kan een beperking zijn van de voorziening of van het geselecteerde type vergrendeling.
/asp-gip10/boeking2.asp, line 17


now i thing i must add a cursortype or locktype but i don't know where to put it in my code.

code:

<%@ LANGUAGE="VBSCRIPT" %>
<% Option Explicit

Dim strKlantID
Dim cnDB
Dim strConnstring

' Verbinding
strConnstring= "DRIVER={Microsoft Access Driver (*.mdb)};DBQ=" & Server.MapPath("c&s.mdb")
set cnDB = Server.CreateObject("ADODB.Connection")
cnDB.open strConnstring, 2, 2

SELECT CASE Request("cmdKeuze")
CASE "Terug"
Dim rstKlanten1
set rstKlanten1 = cnDB.execute("SELECT * FROM qryKlanten")
rstKlanten1.delete
Response.Redirect "Klanttoevoeg.asp"
CASE "Verder" %>

I try to delete the first record of my database (query) but i doesn't work



Someone a solution?
Thanks

Try changing you code to this