Connecting to a wireless connection

Hi all,

I've just arrived at a new apartment in France and can't connect to the wireless network.

I have a HP Pavillion xe4500 laptop running with windows XP Pro. The router is a NEUF NB4-SER-r0.

When I type in the passcode, it says:

"The network password needs to be 40bits or 104bits depending on your network configuration. This can be entered as 5 or 13 ascii characters or 10 or 26 hexadecimal characters."

The "correct" password that I was given is 20 characters. I currently trying to connect via WEP. I wonder if perhaps it has something to do with a compatability issue between american and french keyboards.

Thanks for any and all help!