ispcp 1.0.4 error can't get fastcgi info php5-fcgi-starter

[gnrslash]

Good morning you all.
I've just installed ispcp 1.0.4 on a debian 5.0.4 lenny fresh installation using the installation guide of ispcp.
every step of the installation went good, no error at all.
now i log in to the ispcp control pannel and try to add a new user/domain.
The domain status says: unknown error.
If i try to restart apache it says:

apache2We failed to correctly shutdown apache, so we're now killing all running apache process. This is almost certainly suboptimal, so please make sure your system is working as you'd expect now! (warning).
......waiting....... Syntax error on line 158 of /etc/apache2/sites-enabled/ispcp.conf: can't get fastcgi file info: /var/www/fcgi/mydomain.tld/php5-fcgi-starter, errno: 2
failed.

This is for every domain I've tried to add.
To make apache come up again I have to restore the original ispcp.conf (the one created during installation) in /etc/apache2/sites-available and apache will start.
why is this happening and how can i solve this?

Thank you in advance