Ping Problem HELP

Ping Problem HELP

In my ctf map i want the item pinged, i can do that but when a unit picks up the flag how do i make it ping the unit caring the flag???

Events:
Unit picks up an item
Conditions:
Item type of picked up item = the flag
Actions:
Set hero manupilating item = Flagbearer (unit type variable)
Trigger - Turn off 'the ping trigger'
Trigger - turn on 'a trigger that pings 'the flagbearer' (the variable unit)