Hi,
 
I'm using latest Smith's and getting the following error in my event viewer when I got to add something to the cart using the add to car button. Nothing happens when I click the button but it does appear to add the item to cart. The problem is that you can't tell it's been added because nothing changes when you click the button. Here is the error:
 
AssemblyVersion: 5.6.0
PortalID: 0
PortalName: neighbay.ca
UserID: 9
UserName: paintlover
ActiveTabID: 194
ActiveTabName: Shopping Details
RawURL: /NeighbayAdmin/ShoppingDetails/tabid/194/ProductID/1/Default.aspx
AbsoluteURL: /Default.aspx
AbsoluteURLReferrer: http://www.neighbay.ca/NeighbayAdmin/ShoppingDetails/tabid/194/ProductID/1/Default.aspx
UserAgent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.12) Gecko/20101026 Firefox/3.6.12 ( .NET CLR 3.5.30729; .NET4.0E)
DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider
ExceptionGUID: 9b469486-c624-491b-b3df-70bf687b838f
InnerException: Object reference not set to an instance of an object.
FileName: 
FileLineNumber: 0
FileColumnNumber: 0
Method: Smith.DNN.Modules.BuyNow.MyCart.SaveToCartTable
StackTrace: 
Message:  DotNetNuke.Services.Exceptions.PageLoadException: Object reference not  set to an instance of an object. ---> System.NullReferenceException:  Object reference not set to an instance of an object.    at Smith.DNN.Modules.BuyNow.MyCart.SaveToCartTable(DataTable  myProductList)    at Smith.DNN.Modules.ProductDetail.ProductDetails.AddToCart(Int32  ProductID, Decimal Quantity, Decimal price, Boolean isRequired, Int32  bundleID, Boolean inBundle, Decimal myWeight, Int32 catID)    at  Smith.DNN.Modules.ProductDetail.ProductDetails.ibAddtoCart_Click(Object  sender, ImageClickEventArgs e)    at System.Web.UI.WebControls.ImageButton.OnClick(ImageClickEventArgs  e)    at System.Web.UI.WebControls.ImageButton.RaisePostBackEvent(String  eventArgument)    at  System.Web.UI.WebControls.ImageButton.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String  eventArgument)    at System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler  sourceControl, String eventArgument)    at System.Web.UI.Page.RaisePostBackEvent(NameValueCollection  postData)    at System.Web.UI.Page.ProcessRequestMain(Boolean  includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)    --- End of inner exception stack trace ---