New Post: WorldPay gateway problem...

In WorldPay gateway,their is a problem.When I click on the Worldpay image in checkout,It is redirect only the page not the value of product(product name,price etc).

in worldpay.gateway
<root>

<HtmlRedirectURL>https://secure.wp3.rbsworldpay.com/wcc/purchase</HtmlRedirectURL>
<testURL>https://select-test.wp3.rbsworldpay.com/wcc/purchase</testURL>
<instId>Merchant Code</instId>
    <OrderDescription>Your Website - Webshop Purchase Heading</OrderDescription>
    <Currency>GBP</Currency>
    <ShopperCountryCode>GB</ShopperCountryCode>
    <ButtonImageURL>/dotnetnuke2/Desktopmodules/NB_Store_GatewayWorldPay/WorldPay.jpg</ButtonImageURL>
    <testMode></testMode>
    <extraurl>
      http://www.technoexpertz.com/dotnetnuke2/Products/Basket/tabid/96/stg/4/Default.aspx
    </extraurl>

</root>

and also crate two templates but it is not working properly.
What the reason behind it.plz help