BDC Web Part connection Interface error

I want to provide "Query Value" to the BDC List WebPart from (Provider) businessdata filter webpart. I get fllowing error when i try to connect. "The provider connection point (BusinessDataFilterWebPart) and the consumer connection point "BusinessDataListWebPart" do not use the same connection interface."

Following is my code snippet.

System.Web.UI.WebControls.WebParts.WebPart providerWebPart =
                webPartManager.WebParts[filterWebPart.ID];
            ProviderConnectionPointCollection providerConnections =
                webPartManager.GetProviderConnectionPoints(providerWebPart);
            ProviderConnectionPoint providerConnection = null;
            foreach (ProviderConnectionPoint ppoint in providerConnections)
            {
                if (ppoint.InterfaceType == typeof(ITransformableFilterValues))
                    providerConnection = ppoint;

            }
            System.Web.UI.WebControls.WebParts.WebPart consumerWebPart =
                webPartManager.WebParts[consumer.ID];
            ConsumerConnectionPointCollection consumerConnections =
                webPartManager.GetConsumerConnectionPoints(consumerWebPart);
            ConsumerConnectionPoint consumerConnection = null;

            foreach (ConsumerConnectionPoint cpoint in consumerConnections)
            {
               if (cpoint.InterfaceType == typeof(IWebPartParameters))
                   consumerConnection = cpoint;
            }

 SPWebPartConnection newConnection = webPartManager.SPConnectWebParts(
                providerWebPart, providerConnection, consumerWebPart, consumerConnection);

It looks like you are comparing two different connection interfaces. Your provider connection implements ITransformableFilterValues and your consumer connection implements IWebPartParameters.

I don't know much about the code you have written here as I rarely write connections between web parts in code. But the whole point about connections is the consumer and provider have to provide and expect the same interface.

Have you tried connecting these two web parts together in the browser interface?