COSMOS Express & Assemblies

I have a Student edition of SolidWorks that hasCOSMOSExpress. I want to do a stress analysis on a simple assembly- a rod welded to a base plate. It says I have to run a motionstudy before I can have it do the stress analysis. But there'snothing to move! The Motion study produces nothing. How do I makethis work?SolidworksMotion Studies