[DFBHD] A MED question

[Maverick_Y]

I want to make a BHD map that force player stay undetected. Once the enermy find or shoot the player, mission fail. In DFX series I can write event IF SSN IN RED ALERT AND SSN STILL ALIVE to do it but it seems doesn't work in BHD. Also, some triggers such as SSN SEE SSN, SSN TARGET SSN, SSN SHOOT SSN seem unstable and work probabilistically. That really confused me. Does Anyone know how to realize my design?