[TYPO3-ttnews] tx_news - Extend Tx_News_Domain_Model_Media not working

[Konrad Schiertz]

I will extend the Tx_News_Domain_Model_Media with a small newscustom extension. The fields are visible in the backend. ext_tables.php works.
The problem: i cant get the new field in FLUID.

It seems like the model Tx_News_Domain_Model_Media is not extended. If i extend the model inline everything works fine.

A correct Domain_Model_Media.php file ist generated in the typo3temp/../cache_phpcode. Any idea?

Thanks
Konrad