Thank you Warren, The Utube version worked much better (didn't keep spooling as often and was much quicker overall). FYI, on the Corvera Golf site I got the same error message as the people below, but it worked fine (if slow/a lot of spooling) from my husband's machine, on the same network connection. So I think its something to do with the set-up of individual machines, but haven't got the time or patience to work it out (and no need now, thanks to Warren!).