Trigger problems, No such host (hostname)

[srutz]

Hello,
I'm using Zabbix 1.1 stable and it looks very good to me, but I can not add a trigger to a host, I get allwas an error:
No such host (hostname) or monitored parameter (net.tcp.service[ssh])
the ssh is just a sample and hostname was replaced, I tried lots of different parameters is there a way to check whats going wrong?
this is a killer if I can not fix it.
I searched the forum and found some infos, but not one works for me, I tried also the cookbook sample, without success.

[achu_sab]

Before adding a trigger you have to create an item for monitoring.
For example if you want to know whether ssh service is working(up)
first create an item - net.tcp.service[ssh]
and after that create a trigger - {Hostname:net.tcp.service[ssh].last(0)}=0
It will work for you.

[srutz]

yes, that works...
sorry for my stupid question