Cacti Polling Host - no user stats displayed. please help

[iDen]

cacti 0.8.7g + spine 0.8.7g + plugin arch 2.9
graphs not being drawn:
cacti user session statistic
cacti user statistic

can someone explain me meaning of next graph:
Cacti User Login Statistic. On vertical written User logins and scale 0.0, 0.2, 0.4 up to 1.0 ..... average has value 213.72m
what does this graph mean ? if it count how many user logged in than what doing other two graphs ?

Boost Memmory, Boost runtime, Boost Updates, not being drwn as well - i have boost plugin installed but didn't configured it so seems to be it's disabled.

Recache not being drawn as well - don't know why.
Also i haven't exported graphs so don't know if "export stats" graphs working
Other graphs are working.

How to fix User stats and recache graphs ?

I've downloaded latest template v3 from wiki. placed ss_poller.php and cacti_user.stats.php in scripts directory. (renamed cacti_user_stats.php as was suggested in some other thread regarding this template)

[gandalf]

IMHO, users stats require some specific access permissions. Read the script file to understand more or aks the author browniebraun
R.