openSUSE 11 "Query products failed"

I have in my server rack 3 identical machines:
Intel Pentium 4, 3 GHz, Intel serverboard SE7230NH1-E, Seagate 80 GB SATA.
Fresh install after complete disk wipe, overwriting every byte with 00.
Same installation DVD, checked at start of every installation: no errors.
In two machines no problem.
In one machine it is impossible to update on-line.
Error message “Query products failed”
I tried 3 fresh disk wipes with subsequent installation.
Does anybody now how to cure this?

Thanks

Wolfgang Kluge.