samba - May 2008 - smbd -i hangs when generating certificates, no dns resolving

Hi,
i've worked trough the samba4-howto.
Tried to install samba4 on ubuntu 8.04 Desktop (everything running in  
vmware fusion) .
Installed default System plus:
libattr1-dev libblkid-dev libgnutls-dev libreadline5-dev python python- 
dev
(build-essential & linux-headers for vmwaretools)
when starting "smbd -i -M single" it hangs when trying to generate  
certificates, if i only start "smbd" i can connect to the test-share  
(with my mac) and read file inside, but writing new files will fail:  
filename to long. i've chmod 777 for /data/test/.
Windows XP with correct dns settings will not resolve the realm nor  
anything.
Should i install any further package? Is bind necessary to get name  
resolution, or is it part of smbd?
best regards,
Martin Faust