virtuemart - can't update or delete product in cart

Question: when I try to update the amount of a product in the shopping cart, I click the 'update' button and the page goes to the url.com/index.php, it shows the base of the homepage, but not with all the modules; just the core(background, footer).

If I click 'back' on the browser and return to the shopping cart, it updated the shopping cart, so that is working fine. I don't know how to make the click for updating/deleting a product in the cart to not go to weburl.com/index.php but rather stay in the cart. I believe it has something to do with some开发者_Python百科 php variable or so.

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Go to administrator/components/com_virtuemart/html/basket.php

Change this:

$action_url = $mm_action_url.basename($_SERVER['PHP_SELF']);

For this:

$action_url = 'index.php?page=shop.cart&option=com_virtuemart&Itemid='.$sess->getShopItemid();

Problem fixed.