Disable popup on add to cart button of virtuemart component in JOOMLA 1.7

[Jacob]

I am using Virtuemart 2.0.0 shopping cart component for JOOMLA 1.7. On flypage (product detail page) there a button "Add to Cart" for add product in cart. When click on that button a popup box is open, popup box contains some option and details like product name, continue shopping button and go to checkout.I want disable that popup box on add to cart button when i click that button page is redirect to checkout page. So, anybody give me any idea to disable the popup and where i got that option in configuration of virtuemart on admin side