This looks like http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=576255 Have you installed the virtualbox-ose-guest-dkms package on the host system?
This looks like http:// bugs.debian. org/cgi- bin/bugreport. cgi?bug= 576255 ose-guest- dkms package on the host system?
Have you installed the virtualbox-