Re: Coal Issues???
Everytime I smoke I choose to use 2 layers of regular foil. I personally feel I can manage heat better like that. Your set up seems okay, for the information you've given us. I'll +1 the above posts as to a more in depth description on your set up. It could be a few things.
1. Tobacco touching the foil.
2. Heat Managment
3. Coal Issue
My guess it would be a combination of packing technique and foil. I'd first try and double layer your regular foil, while making sure your tobacco isn't touching the foil in any way....well a little wouldn't hurt.