First a big thank you to all who tried to help.
Now for the embarrassing bit! It now works! In the camera manual there is a short section on connecting to a computer. It doesn't say an awful lot except to assume that you will be using their own software (Windows).
On the camera main control knob the symbols are divided into two sections - one for taking photographs and one for viewing photographs. I had assumed that the first symbol for viewing was the one to use. The second one is for printing and there was a third. I looked that one up in the manual and it said 'Settings/Connection menu'. Selecting that setting and pressing the menu button gave me a menu but no connection options. I decided to try connect with that setting selected and - bingo!
There is no mention of that setting in the 'Connecting to a computer' section.
Ah well - one lives and learns. Sorry about the false alarm.
Barry Samuels http://www.beenthere-donethat.org.uk The Unofficial Guide to Great Britain