I try to run vagrant on my Ubuntu 14.04. So for, I did these steps:

-Install vagrant
-Install virtualbox
-added box for provider

then I run the 

> 
> vagrant up
> 
> 
> 

command.

After running the command, I take these output and at the and there is an error message which I cannot figure out how can I solve and run it correctly.

> 
> Bringing machine 'default' up with 'virtualbox' provider...
> 
> 
> ==> default: Checking if box 'udacity/ud381' is up to date...
> 
> 
> ==> default: Clearing any previously set forwarded ports...
> 
> 
> ==> default: Clearing any previously set network interfaces...
> 
> 
> ==> default: Preparing network interfaces based on configuration...
> 
> 
> 
> ```
> default: Adapter 1: nat
> 
> ```
> 
> ==> default: Forwarding ports...
> 
> 
> 
> ```
> default: 5000 (guest) => 5000 (host) (adapter 1)
> 
> default: 22 (guest) => 2222 (host) (adapter 1)
> 
> ```
> 
> ==> default: Booting VM... 
>  There was an error while executing
>  `VBoxManage`, a CLI used by Vagrant for controlling VirtualBox. The
>  command and stderr is shown below.
> 
> 
> Command: ["startvm", "0399f946-6a87-4310-a22d-c1a4525ae2f0", "--type",
>  "headless"]
> 
> 
> Stderr: VBoxManage: error: The virtual machine
>  'ud381\_default\_1463617458900\_49294' has terminated unexpectedly during
>  startup with exit code 1 (0x1) VBoxManage: error: Details: code
>  NS\_ERROR\_FAILURE (0x80004005), component MachineWrap, interface
>  IMachine
> 
> 
> 

What should I do to fix these error ?