dasgar: thank you for your good reply. I have just answered you, but strangely, it seems the answer has disappeared and doesn't show up in the thread, so I'm trying again.
a. I think you are right about the Strawberry Perl versions. My original Windows 7 system has 220.127.116.11 installed; but I think you have to say: use 5.014;
The new Win XP system I'm trying to make work has 18.104.22.168 installed, but one has to say: use 5.016; Isn't that the case?
b. The original Windows 7 system has Excel 2010 installed. The Win XP system has Excel 2003 installed. Both Excel installations are working fine.
Many TIA - Helen