What size needle are you using? I don't really understand what you mean by "flap", but my first suspicion is that your needle is too small. When I piece, I use a size 11 or 12 needle. When I quilt, I have to go up to a 16 or 18, or the top thread won't catch the bobbin thread and I get nothing but thread laying on top like a dead fish.
Pictures need to be resized to less than 1 meg for uploading. Here are some how-tos that have been posted on that subject.
Preparing (Resizing) Photos For Successful Upload and Viewing
How to Upload (Post) Photos