Can't make "label" for a new HDD

[NiC]

Hi all!

Have trouble - new computer, must be FreeBSD4.8
2 HDDs - first is 20Gb, second 200Gb

When installing - all ok.

After rebooting tried to do through /stand/sysinstall -> Fdisk -> selecting 200Gb HDD ->a->w->q

Then "Label" menu->c->selecting maximum volume->selecting mount point "/base->w->shows the error "Error mounting /dev/ad2s1e on /base : Device not configured" 

What I'm doing wrong?

Please help.

Regards,
Nikolay