Active Tags only show me tags from another vocabulary

Hi,
i created a vocabulary "languages" and made it default for a new content type called job offers.
But when i enable the active tags, the ajax field autocompletes only terms from the forums vocabulary (the list of forums), same with the popular tags proposals.
And when i submit, a new term is not inserted anywhere, neither in my languages nor in the forum vocabulary.

This is astonishing, cause within the forum, it works quite nicely. There i use the taxonomy role module for the admin section and a special administration vocabulary. Everything works there as expected. Autocomplete and proposals refer exactly to the chosen vocabulary.

Do you have a clue why the active tags ignore the other vocabularies in my new content type(permissions are set now freely for all vocabularies) and only looks for the forum categories?

I changed all possible or impossible settings, cleared the cache, gave all permissions, but without a result.

Thanx
Bernd