New Post: The HTTP request is unauthorized with client authentication scheme 'Ntlm'

I am using the SharePoint source list adapter and when I try to connect to any list in SharePoint 2007, I got 401 error. This happens in both designer and SQL Agent, and I am sure that my account and the SQL agent account has permission to the SharePoint list.
It works with all other Web Applications within the farm, but fail for all sites within this particular webapp that I need data from. All webapp in the farm are using Windows Integrated Auth with Kerberos.

Error at Data Flow Task [SharePoint List Source [1]]: System.ServiceModel.Security.MessageSecurityException: The HTTP request is unauthorized with client authentication scheme 'Ntlm'. The authentication header received from the server was 'Negotiate,NTLM'. ---> System.Net.WebException: The remote server returned an error: (401) Unauthorized.
at System.Net.HttpWebRequest.GetResponse()
at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelRequest.WaitForReply(TimeSpan timeout)
--- End of inner exception stack trace ---

Server stack trace:
at System.ServiceModel.Channels.HttpChannelUtilities.ValidateAuthentication(HttpWebRequest request, HttpWebResponse response, WebException responseException, HttpChannelFactory factory)
at System.ServiceModel.Channels.HttpChannelUtilities.ValidateRequestReplyResponse(HttpWebRequest request, HttpWebResponse response, HttpChannelFactory factory, WebException responseException, ChannelBinding channelBinding)
at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelRequest.WaitForReply(TimeSpan timeout)
at System.ServiceModel.Channels.RequestChannel.Request(Message message, TimeSpan timeout)
at System.ServiceModel.Dispatcher.RequestChannelBinder.Request(Message message, TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs)
at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)

Exception rethrown at [0]:
at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
at Microsoft.Samples.SqlServer.SSIS.SharePointUtility.ListsService.ListsSoap.GetListAndView(GetListAndViewRequest request)
at Microsoft.Samples.SqlServer.SSIS.SharePointUtility.ListsService.ListsSoapClient.ListsService_ListsSoap_GetListAndView(GetListAndViewRequest request)
at Microsoft.Samples.SqlServer.SSIS.SharePointUtility.ListsService.ListsSoapClient.GetListAndView(String listName, String viewName)
at Microsoft.Samples.SqlServer.SSIS.SharePointUtility.Adapter.ListsAdapter.GetSharePointList(String listName, String viewId)
at Microsoft.Samples.SqlServer.SSIS.SharePointUtility.Adapter.ListsAdapter.GetSharePointFields(String listName, String viewId)
at Microsoft.Samples.SqlServer.SSIS.SharePointUtility.ListServiceUtility.GetFields(Uri sharepointUri, NetworkCredential credentials, String listName, String viewName)
at Microsoft.Samples.SqlServer.SSIS.SharePointListAdapters.SharePointListSource.GetAccessibleSharePointColumns(String sharepointUrl, String listName, String viewName)
at Microsoft.Samples.SqlServer.SSIS.SharePointListAdapters.SharePointListSource.ValidateSharePointColumns()
at Microsoft.Samples.SqlServer.SSIS.SharePointListAdapters.SharePointListSource.Validate()
at Microsoft.SqlServer.Dts.Pipeline.ManagedComponentHost.HostValidate(IDTSManagedComponentWrapper100 wrapper)
Error at Data Flow Task [SSIS.Pipeline]: component "SharePoint List Source" (1) failed validation and returned error code 0x80131501.