Red Hat Enterprise Virtualization - problem

Hello I have a problem with installing rhev. I have installed rhev-h on my server, then I have installed rhev-m on my windows 2008 r2 virtual machine. Everything seems to be ok, however i can't access http://mywebsite/RHEVManager/WPFClient.xbap. application starts but after few seconds I have information that I can't access the application because of some trust levles. I've read something on microsoft websites but I didn't find a solution. Any ideas?