VirtualBox - Runtime Error. Cannot access the kernel driver!

[Saaz]

I'm trying to install Masonux Linux on Sun VirtualBox, when i start the virtual machine, i immediately get this error :

VirtualBox - Runtime Error

Cannot access the kernel driver! Make sure the kernel module has been loaded successfully.

I only have the abort button to click. When i click on abort i get this :

Failed to open a session for the virtual machine Masonux.
Virtual machine 'Masonux' has terminated unexpectedly during startup.
Details:
Result Code:
E_FAIL (0x80004005)
Component:
Machine
Interface:
IMachine {540dcfda-3df2-49c6-88fa-033a28c2ff85}

Please help me. I don't know what is wrong and what to do.

[Noverism]

Whats your computer's configuration? This may be an important information to post, also post what system configuration you have applied to the virtual machine in VirtualBox? Do post back, may be that information would b able to help in solving your problem.

[Saaz]

My system configuration is :
Intel Core2Duo @ 3Ghz
3GB DDR2 RAM
500GB+160GB HDDs Sata
Gigabyte GA G31M S2L Motherboard
Geforce 8800GT PCI-E Graphics card.

Configuration applied to Virtual machine is :
APCI enabled, IO APCI enabled
PAE enabled, 256MB Ram
128MB Video Ram, 3D acceleration enabled
4GB HDD.

What you think may be wrong with this configuration? I cant get to work any operating system on VirtualBox. Please help...

[SalVatore]

Check if the option is available : VT-x/AMD-v. This option is generally grayed out. If it is not grayed out, try to disable it. If still you have the same problem. Then the problem is that you didn't reboot your system after installation. Uninstall VirtualBox and reboot your PC. Install VirtualBox again. Then again Reboot your PC, it will then have no problem...