If a workflow is created using the Workflow Designer of SharePoint Designer 2007, deployment is simple. If a workflow is created by using Visual Studio 2005 Designer for Windows Workflow Foundation, you have to deploy and activate the workflow before it can be used. For more information about using Visual Studio 2005 Designer for Windows Workflow Foundation to create workflows, see http://msdn2.microsoft.com/en-us/library/ms441543.aspx.
Before you install and activate a workflow that is created using Visual Studio 2005 Designer, make sure the following tasks have been completed:
The workflow must be compiled as a strongly named assembly. This is a developer task.