Disabling Triggers in certain apps

[ChrisCairns]

I have set F2 as shortcut for Mail.app.
I do not wish to invoke Mail.app by pressing F2 when I am using  
NeoOffice Calc.
So I clicked on " i " after selecting the "Open Mail" trigger and  
clicked on "disabled in selected apps" and then i typed in  
"NeoOffice.app"
F2 trigger still invokes Mail.app when I am using NeoOffice Calc.
Someone plz help.