problem with virtualbox 4.1.8 networking

I can’t use Virtualbox with network mode : Host-only Adapter because the interface vboxnet0 is not created.
I think this is something related to dkms , and if i go from virtualbox menu to File-> Preferences-> Network and try to ad host-only interface i get the following :
Failed to create the host-only network interface.
Failed to execute ‘VBoxNetAdpCtl add’ (exit status: 76.
Once i reinstall all the package of virtualbox the vboxnet0 is there and everything is normal but when i restart my calculate-linux 11.12 the problem is present again is there a way to solve this or should i always reinstall the packages of virtualbox to use it??!
thank you

solve problem by follow command in root :

modprobe vboxnetflt

modprobe vboxnetadp