Zabbix 1.8.3 "Host is unavailable"

[Kypck]

Hello,

I try to monitor ssh configuration trough a template on 4 servers. On 3 servers all is working fine, one displays at the trigger "Host is unavailable". Deleting the history won't change anything.

If i try to grab the data from the shell on the zabbix server per

zabbix_get -s host -p 10050 -k"template.sshd.rootaccess"

it returns the proper values (if changes where made to the file etc.)

Any ideas what I can do? (The same problem applies for some other triggers from a different template on that machine, other triggers on that server work fine)

Thanks in advance!