MRTG-eth not displaying data

[lars_kuha]

I recently installed the mrtg-eth-probe to get bandwidth usage documentation from my web server but can't get it to work.

The HTML-document and charts are automatically generated but there is no bandwidth data at all. In the graphs there is nothing and also the max, average and current -tables show nothing but "0.0 B/s (0.0%)" everywhere.

When trying the following:
env LANG=C /usr/bin/mrtg /etc/mrtg/mrtg.conf

I get:

ERROR: Target[host-eth0] [_IN_] ' $target->[0]{$mode} ' did not eval into defined data
ERROR: Target[host-eth0] [_OUT_] ' $target->[0]{$mode} ' did not eval into defined data

Please someone explain this to me...

[tuxbrain]

did you install new network card ? if you had, try uninstall mrtg then reinstall it. It works for me.