Well, the "first" second assist I gave you in form of editing your post the second time........(you definitely ought to read the forum rules......either in English or in German).......
There are a lot of bogus files around in the network. This thread explains to you how to recognize faked files:
http://www.gnutellaforums.com/showpo...98&postcount=4
And this thread tells you how to use the Bitzi function to check files before trying to download them:
How to use Bitzi
Cheers