Cake baking by Lakeland Bread Maker

Okay, GN bakers where did I go wrong? Tried the chocolate and walnut cake as per the recipe printed in the book that came with bread maker. All went well until I extracted it from the pan. Then a substantial amount from the sides fell apart. I had left it for several minutes before extracting it. I left it to cool and then attempted the butter cream when almost all of it fell apart. Cemented it together and it tastes fine but looks a disaster. I think I'll stick to usual cake tins in future. Too ashamed to put a picture on.