ispCP users and groups : Failed

[a1212]

ispcp-omega-1.0.7 install Error
Services setup
* ispCP users and groups: [ Failed ]

ispcp-setup.log :
sys_command() | [ERROR] External command '/usr/sbin/useradd -d /var/www/fcgi/master -m -c vu-master -g vu2000 -s /bin/false -u 2000 vu2000' exited with value 12 !

[joximu]

12 can’t create home directory

at least on debian squeeze...