SFOS v17.0 Beta fail to install Virtualbox

Hello :) 

When i want to install the firewall : 

 

I have the file : 

SW-SFOS_17.0.0_Beta-2-54.iso

this is the config of the machine : 4Go RAM, 40 Go, 64 Bit VM

 

Can you help me ? 

 

Dear,