Thanks for getting onto this so quickly.
I have put documentation onto my site so that you can see the screenshots here: http://www.interweave-now.co.uk/2013/wordpress-automatic-backup/
1) none of the core tables appear in the left side of the window. I have to select them manually
2) when I have selected them I select 'download to my computer' or 'email them' - the effect is the same.
3) when I select 'backup now!' the progress bar displays but never moves and no backup is produced
Sites are hosted by 123-reg and I have access to public_html.
Domains are mapped to public_html/.../.. as required
I create a directory for each client, and if I then instal wordpress to public_html/client/wp/ all works fine.
If I install wordpress in public_html/client/ or public_html/members/ then 1 - 3 above results.
My own site is in public_html/wp/, with wordpress url = http://www.interweave-now.co.uk/wp and site url=http://www.interweave-now.co.uk. interweavenow.co.uk is mapped to /wp which is why wp url and site url are different.
Thanks again Austin