Cacti 1.1.36 - empty graphs, bytes instead of needed MB or G

[guestfreeman]

Hello, i've installed cacti on Windows system, attached monitored server (Linux), created device, graphs for it. Problem: all my graphs show no data - only empty graphs, also - vertical scale shows bytes instead of desired MB or GB. How should I resolve the problem ?

[netniV]

Do you have a poller scheduled to run via Task Scheduler?

[guestfreeman]

Netniv, - yes i have a "cacti" tast in "Tash Scheduler" on machine where Cacti is installed. This task runs every 5 minutes, result of last start - "The job completed successfully"

[guestfreeman]

At now some graphs display data, but now all - more graphs are still empty. I did not change anything in Cacti.

What should i do for all graphs display data ?

[guestfreeman]

I discovered that i cant recieve graphs only from Net-SNMP counters. Why i can't recieve data from not-"Net-SNMP" counters ?

[guestfreeman]

Remark - not all Graphs from SNMP-counters reflect data, there are empty SNMP-graphs too.
So, what's the cause of the problem ? How do i fint it ?