40 Bit? 64 Bit? Confused :S

Hi, I've had a belkin router for a year now with a computer wired to it and one computer wireless and a laptop wirelessly. I recently changed my network adapter on the laptop and my passkey was a WEP. Now it says you can only enter a 40 bit or 104 bit passkey. I set up a 40 bit passkey but when I try to connect wirelessly, it says Limited or No Connectivity. The IP it is recieving is 169.xxx.xxx.xx or something when it should be 192.168.2.1.
Please help as I am using an unsecured network now and I'm concerned about security.

These are the options I got :

I tried setting up 64 Bit which I think is a Hex Key. But when I set this up it wasn't connecting as I stated above.
Please Help,
Thanks

Unfortunately some adapters and routers cannot work together as the encryption strengths are different (as you've found). The best bet would be to try and match the brand of router and adapter, that way you can be sure that they'll work together. Also read up on what encryption an adapter supports before buying, they usually outline them in the features or specifications.

Hi there, all client adaptors should be compatible with WEP 64bit/128bit hexadecimal security key. 40 bit just means 10 hexadecimal (4bit) digits (= 40) and 104 bit means 26 hexadecimal (4bit) digits (= 104). Some AP's let you do some form of ASCII passkey in WEP using all the letters of the alphabet but I don't think all brands of client adaptors will work with this. You should make sure the adaptor has the latest driver as you will often find the CD that comes with it will have a old driver on it.
Cheers
Dale.