New Post: Go to checkout not working in Dnn

Hi Sir,

  I have just started learning Dnn and I installed NB store E-Commerce module on my website. When i clicked on the Go to checkout button. It shows the error like

Server Error in '/' Application.

The resource cannot be found.

Description: HTTP 404. The resource you are looking for (or one of its dependencies) could have been removed, had its name changed, or is temporarily unavailable. Please review the following URL and make sure that it is spelled correctly.

Requested URL: /tabid/122/Default.aspx

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.34212

Please help me to sort out this problem. its urgent.........

My paypal.gateway setting is


<root>

<paymentURL>https://www.paypal.com/cgi-bin/webscr</paymentURL>
    <verifyURL>https://www.paypal.com/cgi-bin/webscr</verifyURL>
    <PayPalID>QGSAN9FRKS63FJRD</PayPalID>
    <CartName>mywebsite</CartName>
    <ButtonImageURL>/DesktopModules/NB_Store/img/horizontal_solution_PPeCheck.gif</ButtonImageURL>
    <Currency>USD</Currency>
    <ReturnURL>http://localhost/mywebsite/CheckOut/tabid/122/stg/5/ordID/[ORDERID]/Default.aspx?PayPalExit=RETURN</ReturnURL>
    <ReturnCancelURL>http://localhost/mywebsite/CheckOut/tabid/122/stg/5/ordID/[ORDERID]/Default.aspx?PayPalExit=CANCEL</ReturnCancelURL>
    <ReturnNotifyURL>http://localhost/mywebsite/CheckOut/tabid/122/stg/4/ordID/[ORDERID]/Default.aspx</ReturnNotifyURL>
    <MerchantLanguage>en</MerchantLanguage>
    <paypalurl>
      <cmd>_xclick</cmd>
      <first_name>[BAddress:AddressName]</first_name>
      <last_name>[BAddress:AddressName2]</last_name>
      <address1>[BAddress:Address1]</address1>
      <address2>[BAddress:Address2]</address2>
      <city>[BAddress:City]</city>
      <country>[BAddress:CountryCode]</country>
      <zip>[BAddress:PostalCode]</zip>
      <email>[OrderUser:Email][Order:Email]</email>
    </paypalurl>

</root>


thank in advance.