Trigger dependency is not working

[localhost]

Having Zabbix 1.8.1, i try to put 2 triggers depending on another one (i have 3 triggers in total) in this way:

• trigger B depends on trigger A
• trigger C depends on trigger A

And delayed the notification to prevent throwing an alert when B or C are triggered before A (refering to http://www.zabbix.com/wiki/howto/con..._notifications), but i allways receive 3 alerts (A, B and C) respecting the delay i've set and never applying the dependencys (i need to get only one alert: trigger A).

Does anyone have any idea ?

[localhost]

any one to help me ?