Wifi disconnects immediately

[hoppengeist]

I got the following problem - after connecting to a Router my Wifi disconnects immediately after it was connected. Versamails wont download and the only thing that works is Netfront...

What do i have to do to fix this???

[AZ-TX]

What type of router do you have?
What security features do you have enabled on your router?

[hoppengeist]

This happens on any router... I've tested to home routers and several Hot Spots directed in Berlin, Germany.