v305 setup disk - problem entering WEP key

Hi All

Until recently I didn't use the v305 that I bought as a bit of an impulse purchase a year or so back.  But moving into a new place makes it sensible to use a wireless printer, so that's what I tried to do.  I set up my v305 with the installation disk, and connected the USB cable when requested but when it came to enter the WEP key for my O2 network I hit a problem.  I know the WEP key is the correct one because my HP laptop connects wirelessly without a hitch when I enter the key as a check.  But every time I enter the WEP key in the v305 setup routine I get the same error message:  my WEP key is not a proper WEP format because the key I entered was *******65Càu.  But I entered only *******65C.  The extra two characters that appear at the end - àu - were not entered by me.  

The extra two characters do not appear in the text box used to enter the key, only in the error message telling me that a WEP key has10 characters (and *******65Càu of course has 12 characters).

I am running Vista Home Premium on a new-ish HP laptop.  What am I doing wrong?  All help gratefully received.  I had a quick trawl through the FAQs and archive but could not find this issue.

The printer works fine when using the USB cable.

Many thanks

Mikef