Based on DNN 1.1 I try build a module which communicates with a database to fill grids and read forms. A few forms running very well but since I tried to add a Textbox String into a database table I got the following exception:

DotNetNuke.Services.Exceptions.ModuleLoadException: Der Typeninitialisierer für MIS.DNN.Modules.ErrorMessageManagement.Data.DataProvider hat eine Ausnahme verursacht. ---> System.TypeInitializationException: Der Typeninitialisierer für MIS.DNN.Modules.ErrorMessageManagement.Data.DataProvider hat eine Ausnahme verursacht. ---> System.ArgumentNullException: Wert darf nicht Null sein. Parametername: type at System.Activator.CreateInstance(Type type, Boolean nonPublic) at System.Activator.CreateInstance(Type type) at DotNetNuke.Framework.Reflection.CreateObject(String TypeName, String CacheKey) at DotNetNuke.Framework.Reflection.CreateObject(String ObjectProviderType, String ObjectNamespace, String ObjectAssemblyName) at MIS.DNN.Modules.ErrorMessageManagement.Data.DataProvider.CreateProvider() at MIS.DNN.Modules.ErrorMessageManagement.Data.DataProvider..cctor() --- Ende der internen Ausnahmestapelüberwachung --- at MIS.DNN.Modules.ErrorMessageManagement.Data.DataProvider.Instance() at MIS.DNN.Modules.ErrorMessageManagement.Business.ErrorMessageManagementController.GetByModules(Int32 ModuleId, String SortField) at MIS.DNN.Modules.ErrorMessageManagement.ErrorMessageOverview.BindData(String SortField) at MIS.DNN.Modules.ErrorMessageManagement.ErrorMessageOverview.Page_Load(Object sender, EventArgs e) --- Ende der internen Ausnahmestapelüberwachung ---

As fare as I know the namespaces correctly defined inside the dataprovider:                                                 Private Shared Sub CreateProvider()
objProvider = CType(Framework.Reflection.CreateObject("data", "MIS.DNN.Modules.ErrorMessageManagement.Data", "MIS.DNN.Modules.ErrorMessageManagement"), DataProvider)
End Sub

I realy don't know whats the reason for the execption. Has anyone of you any ideas?

Sorry about my late reply. I started work at an other module but run quickly in the same problem by installing  as well as including a module.

After every rebuild both assemblys were correct located in the DotNetNuke\bin folder. The isssue about the assambly version number makes me woundering but maybe I missunderstand you. Arn't the assembly-numbers of eache project stored in the assemblyInfo.vb? Although I don't know anything about that numbers I made them equal - with no positiv result.