Problem in VBox status code: -1908

I had the same problem,

VBox status code: -1908

here is what helps me:

1. find your kernel version, use "uname -r" in the terminal:

$ uname -r
2.6.24-21-generic

2. In ubuntu, in addition to virtualbox and virtualbox-ose, you need to install modules. For my version of kernel, I installed this:

$ sudo apt-get install virtualbox-ose-modules-2.6.24-21-generic

3. Then restart virtualbox backend:

$ sudo /etc/init.d/vboxdrv restart
$ sudo /etc/init.d/virtualbox-ose restart
(i am not sure about the order)

4. In Ubuntu main menu in user and groups settings, add yourself to group virtualbox. After this, you need to relogin to X windows. Then start virtualbox, it should work.