Today, when using Media Load Simulator 9, I always appear when I have a video server for me.
Look at the document, you need to build a WMLOAD.ASF file in the publishing point directory!
http://support.microsoft.com/default.aspx?scid=kb;n-us;q251073
The main interface is simple, Start Test / Stop / Properties
Point Porperties, come out, mainly need to set the default server, then add the path you need to test
Set properties such as Play / Long Play in the upper right corner
The number of Play Long Play is the number of clients for pressure testing
Click OK to close the Properties dialog, you can start Test