I'm not in Mandrake just now, so I can't give you the clickety-clicks needed. Can you find the Mandrake Control Center (I think that's what it's called, if you try one center and it isn't in there. try another center.
To start and stop, these are the commands (but you have to configure it to get it to do what you want before these will really do anything useful):
/etc/rc.d/init.d/smb start
/etc/rc.d/init.d/smb stop
/etc/rc.d/init.d/smb restart
Perhaps these links may help
# Mandrake links
Mandrake home page
Mandrake Users website
Easy urpmi config for Mandrake
urpmi mini-HOWTO
Easy software management:
Red Carpet
Maximum RPM
rpmfind
You didn't install the developmental packages? As root, command:
urpmi gcc