<span class="postlistquotedtext"><blockquote>quote:<center><hr width="100%"/></center>Rays Yard wrote:
ok, have you tried resetting your router?<center><hr width="100%"/></center></blockquote></span>
To be honest, I have modified so many settings on my router (NAT forwarding, MAC address filtering and so on) that I was afraid, I wasn't able to reproduce that after the reset.
I guess it was a software problem with the old WLAN stick. I've deleted it and installed a new one which works fine (up to now).