Blan graph and no SNMP info

[Stunty]

Well when i enter this command :
snmpwalk -v2c -c public IP

I get plenty of informations so I guess that SNMP works. It's the same for my localhost and for my other PC.
I also tryied with Getif and it's work too.

[BSOD2600]

Alright so snmp is partially working or something. do you see the device's uptime in the top left corner in cacti? If not, then cacti will NOT function properly with any SNMP query.

Click on verbose query for several of the associated queries, and post the results.