Loadrunner 9.1 10 day evaluation - can't run controller

I've downloaded the Loadrunner 9.1 10 day evaluation and I can run VUGEN and create HTML/HTTP scripts no problem. However when I try to start the controller using the windows start menu Start >Program > Loadrunner > Applications> Controller then nothing happens (checked task manager and no task is invoked).

If I try to start it from Loadrunner menu item Tools>Create Controller Scenario I get the following

Cannot Load XML

Any ideas folks?