Using an N810 on an Orange Livebox router (Inventel firmware v5.10.7-fr) issues a 'Connection error Retry ?' error. Using my laptop in bothWindows Vista and Kubuntu it connects and internet works normally, and there is no Mac address filtering on the router. Then I copied the WPA key (default 26 digit hexstring) to a file which I transferred over USB to the N810. I used it but it did not connect. Then I set up a specific internal address (adjacent to my laptop's):
IP: 192.168.1.175
Mask: 255.255.255.0
Gateway: 192.168.1.1
DNS : 192.168.1.1
(from /etc/resolv.conf on my laptop)
but same error.
My Nokia 5800 phone won't connect either.
Channel is 1 and Wifi g is used. Both my phone and N810 do list the SSID (Livebox-0228) in the wifi hotspot list, so the channel 1 and g only should not be the problem.

I have connected my N810 to soooo many Wifi hotspots all without any problems this is the first time.
Any ideas on this?