Deploy demo web rails to heroku error

I'm deploy a demo web rails to heroku:

I trying with database: postgresql and sqlite3, but still error.
with SQLite3, i edit Gemfile to:
    group :production do
      gem 'pg'
    end
    group :development, :test do
      gem 'sqlite3'
   end

with PostgreSQL, i config in file: database.yml : database, username
and password follow server heroku ( $ heroku console
Ruby console for myapp.heroku.com

ENV['DATABASE_URL']

=> "postgres://username:password@hostname/database")

But when i run myapp from Heroku, is error:

     "We're sorry, but something went wrong.
We've been notified about this issue and we'll take a look at it
shortly."

Please help me!
Sorry, because My English is not good!

Thanks

if you enter "heroku logs" you can often get more info on what's going
on for the heroku errors... that usually helps a lot.

Heroku will not work with sqlite.. i found that postresql worked great
once i got the gemfile set up properly... Here is what i'm using... i
hope this helps:

source 'http://rubygems.org'

gem 'rails', '~>3.1.0'

group :development do
  gem 'sqlite3', '1.3.4'
  gem 'rspec-rails', '2.6.1'
  gem 'annotate', :git => 'git://github.com/ctran/annotate_models.git'
  gem 'faker', '0.3.1'
end

gem 'therubyracer'
gem 'execjs'
gem 'gravatar_image_tag', '1.0.0.pre2'
gem 'will_paginate', "~>3.0.2"

group :production, :staging do
   gem 'pg'
end

  gem 'sass-rails', " ~> 3.1.0"
  gem 'coffee-script'
  gem 'uglifier'

group :test do
   gem 'turn', :require => false
  gem 'rspec-rails', '2.6.1'
  gem 'webrat', '0.7.1'
  gem 'factory_girl_rails', '1.0'
  gem 'rack', '1.3.3'
end

gem 'jquery-rails'

HTH