Building triggers on master for child node events

[aigars]

Hello,

How to properly build the trigger expresion on master to respond when reached the treshold on child node? When inserting expression like "{child node name:web.test.fail[Service].min(#2)}>0" it's displaying error like no such host.

How can I construct trigger on master to handle events from child node? It's possible? My task is so if there is treshold breach on child node then master take all actions like send e-mails, triggers etc. Can anyone explain, please?

Thanks.

NB! Zabbix v.1.6.5

[aigars]

Nobody used zabbix node services? Documentation does not say to much regarding subject.