When I start virtual box in another x session under tty8, I get some strange results. Everything appears to be normal but when I boot up my Windows 7 Home Premium 64 bit system aero does not work. However if I load this same virtual machine in the regular session that is started when logging in nothing is wrong and aero works fine. The command I use is "xinit virtualbox -- :1" Anyone have any idea what is going on?

Thank you in advance.