I am happy to say that Blue is now rendering audio. While reading the csound
tutorials I found out that the DOS version of Csound (the one I had installed
on my computer) does not support real-time performance. So all I had to do was
to change to the 'Windows console' version and in the command options in blue
change csound to consound, or alternatively change consound.exe to csound.exe
(but I didn't want to take any risks!)
I am now ready for the next stage...!

Many thanks for your support