I had already the WA eCart Clear Cart.
So the code now is (just before <!DOCTYPE html ....
<%
' WA eCart Clear Cart
if ((Request.ServerVariables("Request_Method") = "POST")) then
set stickersBE = WA_eCart_ClearCart(stickersBE)
Redirect_redirStr="index.asp"'_redirStr
if (Redirect_redirStr <> "") then
stickersBE_redirStr = Redirect_redirStr
end if
stickersBE_cartAction = "ClearCart"
end if
%>
<% Session.Abandon %>