I have just gone back into finale to see what was selected and its now working, with the cursor moving along and play albeit very quietly. I am confident i will be able to sort the volume. For your information i am running Finale v27.3 on Windows 11 home.
I looked in the help manual and checked that all the options i should have checked were checked. I shut the program down when it wasn't working and when i have opened it again, i can now play and the cursor is moving along and playing the music. All very strange, but hopefully its sorted for now. Thanks again for the quick email,