ISPCP admin blank white page

[tomtom901]

chown: `vu2000:www-data': invalid group


[root@fr01 ispcp]# ls -all
total 28
drwxr-xr-x 7 root root 4096 Apr 11 08:01 .
drwxr-xr-x 11 root root 4096 Apr 4 23:23 ..
drwxr-xr-x 2 root root 4096 Jul 14 00:00 backups
drwxr-xr-x 2 root root 4096 Apr 11 08:00 daemon
drwxr-xr-x 9 root root 4096 Apr 11 08:00 engine
dr-xr-x--- 13 vu2000 apache 4096 Apr 11 08:00 gui
drwxr-xr-x 2 root root 4096 Apr 11 08:00 keys