exposed filters with hierarchical select

hello

D6
modules: cck, views, hierarchical select (newest versions)

i´m working on a real estate website. i added some content types like house, appartment and so on
if you add a real estate, you can add a location too, this is realized with taxonomy.

the location is split in country > state > destrict > zip-code > city> street
country is a vocabulary, state is a vocabulary and so on ...

now i have a view with exposed filters and there you can search for the location too.
the problem is that i don´t know how to get this to work how i want to. you can search for every term, but there is no relationship between them.

what i´m looking for:
you choose austria and then you should only get states of austria in the state-field (this could be a drop-down-list or better a auto-complete-textfield). then you choose a state, for example vienna, and then you get only destricts of vienna and so on

does anyone know how to realize that? i tried a lot, but i don´t have a solution for that now ...

my drupal-know-how is advanced, php-know-how very poor

thanks+greets