[TYPO3] Multilanguage Prob with content_fallback

[Harald Klotzberg]

Good evening everybody,
 
i have a prob running a multilanguage site with 3 languages (german,
english, french).
T3 4.0 with TV 1.0.1 is running. It´s done as a OneTree Installation,
everything runs perfect with translated CE´s.
 
The problem is, that i have a product section, where the content is stored
only in the default language. The Content is "multilanguaged" 
(all languages in one flexible content element like this: Größe / Size /
taille .. and so on. The FCE has not fields for each language, 
only one text field holding all languages.
 
The FCE DS has 
<meta type="array">
<langChildren type="integer">0</langChildren>
<langDisable type="integer">1</langDisable>
</meta>
 
inside, showing only input field once (for the default language = german)
 
The Menue is mixed, some items named equal in all languages (e.g.
productname: Fun),
so no translation is needed. This works perfect. Others called Women, Men,
Kids, so it have to be translated
in different languages. The Menueitem in this case must be there for each
language,
the content should shown from the default language.
 
normally 
    config.sys_language_mode = content_fallback ; 0
should do the job, but it only shows a blank page for pages with
localization and no content, no default content :(
 
anyone have a hint what´s wrong? maybe there is a conflict with another
setting and it´s known?
googling and checking all lists doesn´t help me out.
 
thanx in advance
grzt, harry