Stopping VirtualBox sessions

[Claude Jones]

I keep VirtualBox running as a different user, cjremote, on my office 
Fedora 16 machine.
I have a Windows 7 virtual machine constantly running in VirtualBox 
which I use for some very specific work related tasks
When I am at the office, I want to able to shut down that virtual 
Windows machine so I can reboot the physical machine after certain 
updates, like today's kernel update
The trouble is, if i login to my remote user desktop, cjremote, here at 
work and open VirtualBox, I can see the running virtual machine in the 
VirtualBox management interface but I can't show it or connect to it, 
and, if I try to pause it, I get an "access denied" message
Is there some way to do this?