issue in configuring hostname+domainname

[sam]

Hi,

I tried set host/domain name using the dfui installation program in 
FreeSBIE1.1. When entered hostname and domainame in the configuration 
box and press OK, I don't see hostname/domain name are written to the 
/etc/rc.conf file.

I might be have missed some intermediate steps. But I m not sure..
Is there any instruction/doc about how to use dfui* tools?
Sam.