Oh so simple Why did I not think of that! Thank you SteveS

My first few attemps with KRpano have been reasonably successful but last night and this morning all I am achieving is a black act in the coal cellar at midnight result. Due to my lack of knowledge or stupidity (possibly both) I cannot work out why or where to start. I have tried different resolutions/formats and still the same result. Ideas will be gratefully received! link to original image plus KRpano output can be found at www.jam96.com/uploads/Blackout.zip