[CentOS] Zabbix on CentOS: system.users.num question

Wed Sep 17 15:42:30 UTC 2014
1th at setevoy.kiev.ua <1th at setevoy.kiev.ua>


I have installed Zabbix 2.2.6 on CentOS 6.5.

Question not too relative to CentOS, but hope somebody can help with it.

All triggers works correctly, but venti:system.users.num.last(0)}>0 - 

Screenshot one: http://i.stack.imgur.com/YM9mu.png
And second one: http://i.stack.imgur.com/TMNqx.png

 From manual 
we see, that:

> Command who is used on agent side.

who on box side:

14:29:44 [root at venti /tmp] # who
setevoy  pts/0        2014-09-15 14:15 (85.*.*.15)
setevoy  pts/1        2014-09-15 14:15 (:pts/0:S.0)

# who | wc -l

Thus - system.users.num must be > 0 now.

What I'm doing wrong?