GP2013 Web Client Installation Issue

Hi,

I downloaded a Demo Virtual Machine with all the GP2013 functionallity installed, but the GP2013 Web Client is not working

The Session Central Service is down, and when i try to manually start it, i get the following error:

The GP Session Central Service service on Local Computer started and then stopped. some services stop automatically if there are not in use by other services or programs

Any suggestion?

I really appreciate your comments.