rrd- data can't be created

Hello,

I've installed hobbit 4.1.2 on debian alpha port.

I could compile the sources without any problem.
I also can see the current states of my computers,
but the diagramms are not working.

Therefore if had a look into the rrd- logs and
foun an error message.

2006-08-08 10:47:41 RRD error creating 
/usr/local/hobbit/data/rrd/wva-svalpha2/netstat.rrd: min must be less than 
max in DS definition

The error is dislayed for every DS configured on the server.

Any suggestion?