[TYPO3-english] ttnews categories in BE issue

[mg at tu3w.net]

Hi,
in some TYPO3 installations we're having an issue when trying to  
categorize a news in the
Backend, the created tt_news categories don't display, see link below:

http://es.drop.io/typo3tnewscatlisting/asset/categories-noshow-ttnews-gif

We have unistall and reinstall the extension again, however the  
problem persists.

Any ideas or advices how to solve this?

Thanks,
Miguel