I figured it out, and am very ashamed to say it was user error 
I accidently uploaded the slt rather than G-code file!
@deckingman thanks for your input and keep up the good work on your projects, you have a new follower
@Phaedrux thanks for the advice
@dc42 Again thanks for responding - should uploading anything else other than a g-code file to print be a valid user story?
Again thanks all for you inputs
Mark