I have the same problem with other plugins for events.
it could be that this is the problem, i.e. other event plugins are changing your site and causing problems for our plugin.
do you see these events in your wp admin area?
also, did deactivating all other plugins and viewing this using the twentyeleven theme not solve the problem? if not, then I'd advise making sure all plugins are deactivated and keep the default theme, uninstall (so everything EM gets deleted) and re-install Events Manager
Then try viewing the default events created to see if they appear.