VBoxmanage not working in Virtualbox jail

Hello!

I have installed a virtualbox jail using the included Template. Since i have to configure the installation somewhat, I have to use VBoxManage inside the jail. Sadly, it doesn't work - VBoxManage can't list the installed VMs. And - if, for example, I try to start a VM called "AppServer" by using

# VBoxManage startvm AppServer

I get this error:

VBoxManage: error: Could not find a registered machine named 'AppServer'

VBoxManage: error:...

VBoxmanage not working in Virtualbox jail