Centos – iDRAC monitoring with zabbix

I want to monitoring my Dell's iDRAC with Zabbix 3.0 (on Centos7). But it does not load the custom MIB. I tried every solutions what I found, but its still do nothing.

Zabbix error:

SNMP agent item "sysUpTime" on host "host_name" failed: first
network error,

I tried to put "mibs +ALL" to snmpd.conf. (and etc)

I can run this command:

snmpwalk -v2c -c Gate1 -O e xxx.xxx.xxx.xx

But its dont load the Dell's MIB.

Edit:

The zabbix cant connect to iDRAC over SNMP.

Error:
SNMP agent item "sysUpTime" on host "Gate1_iDRAC" failed: first network error, wait for 15 seconds

I selected "Templates SNMP Devices", but the other hosts are still working fine with SNMP.

Edit2:

Okay, i had to define in macros the {$SNMP_COMMUNITY}, and now, its working w/o DELL's MIB.

The END

The macro has solved the problem, so everything work fine.
This is my fault.

(Reallly sorry for my English)