Hola se me presento este inconveniente al instalar VirtualBox

descargue el virtualbox_1.5.4-27034_Debian_etch_i386.deb y al instalarlo me aparece este mensage

una vez instalado, lo ejecuto creo la maquina virtual y al iniciarla aparece este mensaje

VirtualBox kernel driver not installed. The vboxdrv kernel module was either not loaded or /dev/vboxdrv was not created for some reason. Re-setup the kernel module by executing '/etc/init.d/vboxdrv setup' as root.
VBox status code: -1908 (VERR_VM_DRIVER_NOT_INSTALLED).

Result Code:
0x80004005
Component:
Console
Interface:
IConsole {1dea5c4b-0753-4193-b909-22330f64ec45}

/var/log/vbox-install.log
Makefile:73: *** Error: unable to find the sources of your current Linux kernel. Specify KERN_DIR= and run Make again.. Alto.

No se a que se debe este error

Gracias a todos