thanks to garvinhicking for the support via ICQ.
The problem is the language, as soon as I use english instead of romanian it works.
Any fix for this issue? or workaround?

one ( the one thats working )
ist http://livadaru.net/cristian/
the other one
http://bogdan.vwclub.ro/

I have a multiuser installation and for my blog it works but for a other user where I wanted to install it I see a syntax error in the javascript console.

Error: syntax error
Source File: http://foobar.com/plugins/serendipity_event_tinymce/tinymce/jscripts/tiny_mce/tiny_mce_gzip.php?theme=advanced ...

thank you thank you thank you !
this is sooooooooo easy after your tip with the chdir.

so what I did is install the blog in components/com_blog/ direcotry ( or com_foobar ) mambo / joomla then uses this as component if you enter as link index.php?option=com_blog ( or com_foobar ) then you need a ...

actualy this is not realy a installation problem since my s9y runs great. But it kind of bugs me that I have to run in a wraper.
I didn't find any mambo / joomla component for this.
I tried it on my own by creating in the components directory a link to my blog
ln -s com_blog /var/www/dracula/blog ...