jubuntu cannot open vitualbox

Failed to open a session for the virtual machine winxp.

The virtual machine 'winxp' has terminated unexpectedly during startup with exit code 1.

Result Code: NS_ERROR_FAILURE (0x80004005)
Component: Machine
Interface: IMachine {480cf695-2d8d-4256-9c7c-cce4184fa048}



Failed to open a session for the virtual machine winxp pro 64.
The virtual machine 'winxp pro 64' has terminated unexpectedly during startup with exit code 1.
Result Code: NS_ERROR_FAILURE (0x80004005)
Component: Machine
Interface: IMachine {480cf695-2d8d-4256-9c7c-cce4184fa048}

closely followed by this in another pop-up:

Kernel driver not installed (rc=-1908)

The VirtualBox Linux kernel driver (vboxdrv) is either not loaded or there is a permission problem with /dev/vboxdrv. Please reinstall the kernel module by executing

'/etc/init.d/vboxdrv setup'

as root. If it is available in your distribution, you should install the DKMS package first. This package keeps track of Linux kernel changes and recompiles the vboxdrv kernel module if necessary.