scraping from bundes-telefonbuch.de with python

[davidgp]

hello, i'm new on this group, and quiet new to python!
i'm trying to scrap some adress data from bundes-telefonbuch.de but i
run into a problem:
the link is like this: http://www.bundes-telefonbuch.de/cgi-btbneu/chtml/chtml?WA=20
and it is basically the same for every search query.
thus i need to submit post data to the webserver, i try to do this
like this:

opener = urllib2.build_opener()
opener.addheaders = [('User-Agent', 'Mozilla/5.0 (compatible;
Konqueror/3.5; Linux) KHTML/3.5.4 (like Gecko)')]
urllib2.install_opener(opener)

data = urllib.urlencode({'F0': 'mySearchKeyword','B': 'T','F8': 'A ||
G','W': '1','Z': '0','HA': '10','SAS_static_0_treffer_treffer': 'Suche
starten','S': '1','translationtemplate': 'checkstrasse'})

url = 'http://www.bundes-telefonbuch.de/cgi-btbneu/chtml/chtml?WA=20'
response = urllib2.urlopen(url, data)

this returns a page saying i have to reenter my search terms..
what's going wrong here?

Thanks!!