Installation: nothing in rra

[Putnik]

Hello All.
Maybe there was such a topic but forum doesn't allow to search short words like rra or rrd, so I apologize for repeating.

Fresh new Cacti installation. No errors during install. No graphs displayed but pooler looks ok:
02/25/2012 02:49:18 PM - SYSTEM STATS: Time:0.9178 Method:cmd.php Processes:1 Threads:N/A Hosts:2 HostsPerProcess:2 DataSources:0 RRDsProcessed:0


Investigation gave me this error:

RRDTool Says:
ERROR: opening '/***/cacti/rra/localhost_load_1min_5.rrd': No such file or directory

And really /cacti/rra is empty.

How can I re-create them?
Thank you.

[gandalf]

Please start debugging be reading 2nd link of my sig (login to find the sig)
R.

[Putnik]

Thank you, it helps!