I have checked and the ProgramData key did have the path with a lowercase D. I have changed it.
The posters only appeared after a reboot, I checked immediately after changing it and found that the log still had the path as lowercase so tried the reboot.
So a big
from me. Thank you very much. I suspect when I set up the XML file mentioned in a previous post I would have typed everything in lowercase (windows not caring).
Hopefully this helps others in the future,