on the checkout page, you have the following code at lines 47 - 58:
<%
if (WA_eCart_IsEmpty(QuoteCart2))     then
  QuoteCart2_redirStr = "mybasket.asp"'_redirStr
  QuoteCart2_cartAction = "RedirectIfEmpty"
end if
%>
<%
if (WA_eCart_IsEmpty(EFTCMain))     then
  EFTCMain_redirStr = "mybasket.asp"'_redirStr
  EFTCMain_cartAction = "RedirectIfEmpty"
end if
%>
it looks like you have 2 cart objects in your site, EFTCMain, and QuoteCart2. This code will set the cart to redirect to the mybasket.asp page if one of those carts is empty. you should probably remove the redirect code for the quoteCart2 object:
<%
if (WA_eCart_IsEmpty(QuoteCart2))     then
  QuoteCart2_redirStr = "mybasket.asp"'_redirStr
  QuoteCart2_cartAction = "RedirectIfEmpty"
end if
%>


