checkgroups usage

I've removed the gmane group from the config, but gmane keeps showing up 
in interesting groups.  I think this can be fixed with checkgroups?

Am I not doing this correctly?


root@dur:~# 
root@dur:~# head -n 3 /var/spool/news/leaf.node/groupinfo 
0 1 2 1368645998 0 0 
0.akita-inu 1 2 1368645998 0.akita-inu
0.alaskan-malamute 1 2 1368645998 0.alaskan-malamute
root@dur:~# 
root@dur:~# checkgroups /var/spool/news/leaf.node/groupinfo 
cannot read configuration.
root@dur:~# 



thanks,

Thufir