I am a 63 year old man who has never played an instrument before but I have recently started learning to play the harmonica. I’m half way through my second 12 week term of harmonica and I am not only unable to play with other harmonica players in the class I still can’t play with a backing track, which means I can’t play with a band.

This week's lesson was a good example. I’ve practised a piece all week and have it pretty close to perfect. On my own at home I can play the piece from start to finish, in class on my own I can play from start to finish but if the person next to me plays with me or the entire class plays along I lose it totally. The same when a backing track is put on and we each play individually. 

I need something to help me work this out .... any clues or advice?