Problems with generating some triggers

[rjk]

Hello,

we have problems with generating some triggers:
for example:
{Host.Win32:service_state[Eventlog].last(0)}>0

The following appears:
[ERROR:Cannot update trigger]

No such host (Host.Win32) or monitored parameter (service_state[Eventlog])

This happens also on other services (DNS, WINS, vds, ...)

But this is not a general problem; because some services are working fine.
For example, this works:
{Host.Win32:service_state[wuauserv].last(0)}>0

Have anybody an idea about that?

We use zabbix 1.1beta9


rjk