If something’s wrong in compilation, please check the following settings of Visual Studio Express:

•Check the building configuration (x64=64bit, x86=32bit): it must match the version of the dlls into the bin64 or bin folder:

•Check the References of the CodeWorkflowTestExpress VB.NET project into the solution (into the SolutionExplorer window, right-click on the CodeWorkflowTestExpress project, select Properties and check the References tab). If some referenced library has wrong or missing path, you can try to remove and re-create (Add button) the reference into the project.