Vinum dumpconfig returns nothing ?!?

Hello,

I am trying to setup a software raid5 volume using Vinum on FreeBSD 5.2. 
So far I did successfully complete these tasks :


- Created the config file :
drive d0 device /dev/ad10
drive d1 device /dev/ad11
drive d2 device /dev/ad4
drive d3 device /dev/ad6
drive d4 device /dev/ad8
drive d5 device /dev/ad9
volume terabyte
  plex org raid5 433k
    sd length 0 drive d0
    sd length 0 drive d1
    sd length 0 drive d2
    sd length 0 drive d3
    sd length 0 drive d4
    sd length 0 drive d5


- Created the volume in Vinum and initialized it (whoa it took a long
time!) :
vinum -> list
6 drives:
D d0 State: up /dev/ad10 A: 0/194481 MB (0%)
D d1 State: up /dev/ad11 A: 0/194481 MB (0%)
D d2 State: up /dev/ad4  A: 0/194481 MB (0%)
D d3 State: up /dev/ad6  A: 0/194481 MB (0%)
D d4 State: up /dev/ad8  A: 0/194481 MB (0%)
D d5 State: up /dev/ad9  A: 0/194481 MB (0%)

1 volumes:
V terabyte State: up Plexes: 1 Size: 949 GB

1 plexes:
P terabyte.p0 R5 State: up Subdisks: 6 Size: 949 GB

6 subdisks:
S terabyte.p0.s0 State: up D: d0 Size: 189 GB
S terabyte.p0.s1 State: up D: d1 Size: 189 GB
S terabyte.p0.s2 State: up D: d2 Size: 189 GB
S terabyte.p0.s3 State: up D: d3 Size: 189 GB
S terabyte.p0.s4 State: up D: d4 Size: 189 GB
S terabyte.p0.s5 State: up D: d5 Size: 189 GB


Now the problem is that everytime I reboot the machine to test if the
volume automounts correctly (yes, start_vinum="YES" is in rc.conf), all
the configuration is lost and I must recreate and reinitialize the volume
(effectively losing all my data)...

Now what's weird, just after setting everything up and finishing
initializing the volume, I just can't seem to be able to dump the config
from the disks!  Even if I do a saveconfig (which I shouldn't have to do
since config. updates are not disabled), there's nothing returned from
dumpconfig! :
vinum -> saveconfig
vinum -> dumpconfig
vinum ->

I had the exact same problem with FreeBSD-5.1 ...  I tought Vinum might be
broken and since the machine is a fresh install, I decided to reinstall
from 5.2...  Same problem! :(

Any ideas ?

Vincent