> 
> What can I be doing wrong ???
> 
> This is the log file some minutes after the gauge option was added.
> [root@krusty notes]# head mta01msgs.log
> 931203367 1512 1512
> 931203367 1512 1512 1512 1512
> 931203073 1507 1507 1507 1507
> 931203000 1507 1507 1507 1507
> 931202700 1446 1446 1507 1507
> 931202400 0 0 0 0

MRTG calculates the delta: (most recent poll) - (one before)

Then it calculates the time interval: (time@most recent)-(time before)

>From 931202700 to 931203000 the numbers are:

(1507) - (1446) = 61 something
   and
(931203000)-(931202700) = 300 seconds

Now it's time to calculate the rate:

increase of 61 in 300 seconds, thats just over 0.2 and this is rounded
down (we're working integers here!!!) to 0 something per second.
Your log *is* updated, albeit with zero's.

Look in config.html (via http://ee-staff.ethz.ch/~oetiker/webtools/mrtg/)
for the options perminute and/or perhour...

Regards,
Alex