My first post! And a problem already! Doh!

[#1]

Thanks adiewoo, thats interesting, I havnt ever been asked for a password. My wireless adaptor came with some software calling itself a wireless LAN configuration tool. After putting the adaptor into a USB port this starts automatically and displays the available networks, including Plusnet. Then its just a matter of pressing the button marked, Connect this site.

[#2]

I dont think any one has said what router have you got? was it from Plusnet or one you already had?

[#3]

Ahhhhh, hang on! Maybe Ive susses it!
This configuration utility is not exactly clear about what you have to do, the installation instructions are less than explanitary! I just worked out that what WPA PSK means! (here its written as Pre-shared key, and I didnt make the connection, no pun intended), and there was no mention anywhere about having to fill in information to be able to connect. When I workrd that out and put in the relevant info hey presto! It connected!
Lots of thanks to all who attempted to help me out here, what a nice friendly place this is!I hope one day to be able to repay the complimant, (fat chance!)

[#4]

Glad you've got it sorted 

[#5]

Excellent - these things usually turn out to be something simple (at least in hindsight).