Error "Could not find file" when trying to deploy in the WebDesigner

Hi,

I´m currently trying to deploy my first workflow in Blackpoint. I´m using the web designer.

But every time I try to deploy it, I get the following error message (the exact name of the .dll changes, but beeing in the temp directory I think thats kinda expected):

System.Exception: System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> Could not find file 'C:WindowsServiceProfilesNetworkServiceAppDataLocalTemp-hr1tvkn.dll'.
   at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
   at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
   at SourceCode.SharePoint.WebServices.K2SPLists.GetListFields(String listName, Boolean includeReadOnly)
   at SourceCode.Workflow.Design.SharePoint.WorkflowIntegration.Process.WFIntegrationPropertyWizardDefinition.GetSPItemFields(Boolean isDocumentLibrary)
   at SourceCode.Workflow.Design.SharePoint.WorkflowIntegration.Process.WFIntegrationPropertyWizardDefinition.BuildMetaDataXML()
   at SourceCode.WebDesigner.Authoring.SharePoint.GenerateProcess.ProcessSetup(DefaultProcess& newProcess, XmlDocument InputData, XmlDocument xmlProcess, String ProcessName, String ProjectName, String UserName)
   at SourceCode.WebDesigner.Authoring.SharePoint.GenerateProcess.Generate(String UserName, Int32 ProcessID, String InputData, String ProcessXML, String ConnectionString)
   at SourceCode.WebDesigner.Authoring.SharePoint.GenerateProcess.Generate(String UserName, Int32 ProcessID, String InputData, String ProcessXML, String ConnectionString)

Any help would be very appriciated, because I can not find out whats wrong.

bye,

Matthias