A sad face in the top right hand corner of the chart usually means that the EA has been installed but has not been enabled for live trading
To do this right click on the chart where the EA has been placed, select ‘Expert Advisors’, then ‘Properties’. In ‘Properties’ check the box labelled ‘Allow live trading’, then click ‘OK’. Your EA is now enabled for live trading.
To enable automatic trading in your platform go to ‘Tools’, then ‘Options’, select ‘Expert Advisors’ and check the ‘Allow automated trading’ box.