there is no redirect set for the checkout server behaivor.
The checkout button code is at line 43 - 61:
<?php
//WA eCart Redirect Check Out
if (isset($_POST["eCartEWEB_Checkout"]) || isset($_POST["eCartEWEB_Checkout_x"])) {
$Redirect_redirStr="";
if ($Redirect_redirStr != "") {
if (isset($_SERVER['QUERY_STRING']) && $_SERVER['QUERY_STRING'] != "") {
if (strpos($Redirect_redirStr, "?") === false) {
$Redirect_redirStr .= "?".$_SERVER['QUERY_STRING'];
}
else {
$Redirect_redirStr .= "&".$_SERVER['QUERY_STRING'];
}
}
$eCartEWEB->redirStr = $Redirect_redirStr;
}
$eCartEWEB->cartAction = "Checkout";
}
?>
edit line 46 of the cart page:
$Redirect_redirStr="";
to set the redirect for the checkout button.
$Redirect_redirStr="checkout.php";