No traffic in mrtg and no network devices in phpsysinfo?

[EsCo]

It seems like my kernel or my iptables, don't know how it works exactly, aren't logging my network traffic.

I've installed mrtg correctly and it works (finally!) with net-snmp. The snmpd get's my networkadapters and all. When I run mrtg everything's fine, but when I view the mrtg pages the traffic seems to be 0 or near 0. And I'm sure that is not the case, I have an avarage upstream of 100 KB/s.
http://jeuj.bounceme.net/mrtg/localhost_2.html

Then another weird thing showed up when I installed phpsysinfo. It isn't showing any network devices in network usage. Then again, the adapters show up in phpsysinfo's own pci device list.
http://jeuj.bounceme.net/phpsysinfo

I'm using gentoo kernel 2.4.20 fyi.

Anyone any idea about what I forgot to setup?