Samba startup problems

[Matthew Western]

Hi,
I've got a problem with Samba starting up on an Alpha running redhat 5.0 .
It takes ages
to load to of the services and the second times out with an error:

Starting SMB services:  smbd httpd:  cannot determine local host name.
Use ServerName to configure it manually.

Anybody got any good ideas.  I've read all the stuff I can find about samba 
but not had any luck.

Matthew