Empire earth 2 demo video problem

[Guest]

i downloaded empire earth 2 demo and installed it in my PC when i open it only audio is coming but the video is not coming and the monitor is in stand by mode why

 

[soundguruman]

click my computer
click control panel
click display
click screen saver
click power
set turn off monitor to never
set system standby to never
set turn off hard disks to never
click apply, click OK, restart the computer