Hello,
wow ok that was my bad, but also i have to talk to my roommates 
The Wifi name is slightly different between the 2,4 ghz and the 5 hgz. Just the F in wifi is caps or not.
Now i could connect.
So sorry to go to all this writing because of my supidity...
But now it seems to work THANKS once again.
i´m so embarresed 