Virtualbox comes back to live after upgrade from lenny to squeeze

After upgrade from lenny to squeeze, the installed virtualbox didn't work any more. Try to load the module manually

>modprobe vboxdrv

The following messages are shown:

WARNING: The character device /dev/vboxdrv does not exist. 
         Please install the virtualbox-ose-modules package for your kernel and
         load the module named vboxdrv into your system.

         You will not be able to start VMs until this problem is fixed.

The most important thing is to installed the right linux-headers packages.  For the updated system (squeeze) with a kernel 2.6.32-5-686,

>sudo apt-get install linux-headers-2.6-686

DKMS will build the VirtualBox OSE modules for your system.

>modprobe vboxdrv

>virtualbox

Virtualbox comes back ...

References:

• http://wiki.debian.org/VirtualBox