[Tim Wood]

Do you have a project and context that match the given names you used? They don't have to match exactly; OmniFocus' Mail parsing uses the same completion matching code that is used in the interface so if you have a Context called "Home Office", you could use "hoff" as the Context.

OmniFocus will not create projects and contexts when parsing Mail right now as we don't want to create clutter if you've accidentally misspelled something; if you find this irksome, let us know with Help > Send Feedback so we can consider it for the future.