Probleme lm-sensors snmp

Bonjour,

J'ai un gros problème pour récupérer les valeurs de lm-sensors via snmp.

Je suis sous debian avec un kernel 2.6.25.

la commande sensors me retourne bien les valeurs voulu :
# sensors
w83627dhg-isa-0290
Adapter: ISA adapter
VCore: +1.34 V (min = +0.00 V, max = +1.74 V)
in1: +11.99 V (min = +3.70 V, max = +3.54 V) ALARM
AVCC: +3.28 V (min = +1.23 V, max = +2.11 V) ALARM
3VCC: +3.28 V (min = +2.42 V, max = +3.54 V)
in4: +1.82 V (min = +0.11 V, max = +1.58 V) ALARM
in5: +0.12 V (min = +1.48 V, max = +0.95 V) ALARM
in6: +5.02 V (min = +3.40 V, max = +3.97 V) ALARM
VSB: +3.28 V (min = +1.70 V, max = +0.69 V) ALARM
VBAT: +3.06 V (min = +2.26 V, max = +1.25 V) ALARM
Case Fan: 0 RPM (min = 1318 RPM, div = 64) ALARM
CPU Fan: 2163 RPM (min = 15340 RPM, div = 8) ALARM
Aux Fan: 0 RPM (min = 680 RPM, div = 64) ALARM
fan4: 0 RPM (min = 8881 RPM, div = 8) ALARM
Sys Temp: +31.0°C (high = +87.0°C, hyst = +117.0°C) sensor = thermistor
CPU Temp: +39.5°C (high = +110.0°C, hyst = +75.0°C) sensor = diode
AUX Temp: -0.5°C (high = +80.0°C, hyst = +75.0°C) sensor = thermistor
cpu0_vid: +0.000 V

Mais un snmpwalk ne me retourne aucune valeurs concernant sensors.
Si quelqu'un pouvait m'aider à résoudre ce problème.
Merci d'avance