If you get this error when try to create a sharepoint wf in vs 2008.

you need to create a workflow from sharepoint site to be able to create a WF from VS 2008, this means go to your document in the sharepoint site the from the menu select  Settings —> Document Library Settings —> workFlow settings —> then Add a Workflow. Create a dummy document and then start the workflow.

after u finish this u will be able to create a WF from VS 2008 and make sure the url without / at the end, should look like “http://app01:17768/sites/u2ucourse”