Heroku Error: App crashed

Hi,

I deployed my application on heroku and while visiting it form url
http://blooming-day-347.heroku.com/ it gives me app crashed error. By
log file I see the below error:

==> dyno-4757045.log (crash) <==
/disk1/home/slugs/1e63ec9f-b582-4585-b5ae-5fafc992e826/mnt/app/models/salesforce
/account.rb:1: superclass mismatch for class Account (TypeError)
from
/usr/ruby1.8.7/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31
:in gem_original_require' from /usr/ruby1.8.7/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31 :inrequire’
from
/home/slugs/1e63ec9f-b582-4585-b5ae-5fafc992e826/mnt/.gems/gems/act
ivesupport-2.3.8/lib/active_support/dependencies.rb:158:in require' from /home/slugs/1e63ec9f-b582-4585-b5ae-5fafc992e826/mnt/.gems/gems/act ivesupport-2.3.8/lib/active_support/dependencies.rb:265:inrequire_or_load’
from
/home/slugs/1e63ec9f-b582-4585-b5ae-5fafc992e826/mnt/.gems/gems/act
ivesupport-2.3.8/lib/active_support/dependencies.rb:224:in depend_on' from /home/slugs/1e63ec9f-b582-4585-b5ae-5fafc992e826/mnt/.gems/gems/act ivesupport-2.3.8/lib/active_support/dependencies.rb:136:inrequire_dependency’
from
/home/slugs/1e63ec9f-b582-4585-b5ae-5fafc992e826/mnt/.gems/gems/rai
ls-2.3.8/lib/initializer.rb:414:in load_application_classes' from /home/slugs/1e63ec9f-b582-4585-b5ae-5fafc992e826/mnt/.gems/gems/rai ls-2.3.8/lib/initializer.rb:413:ineach’
from
/home/slugs/1e63ec9f-b582-4585-b5ae-5fafc992e826/mnt/.gems/gems/rai
ls-2.3.8/lib/initializer.rb:413:in load_application_classes' from /home/slugs/1e63ec9f-b582-4585-b5ae-5fafc992e826/mnt/.gems/gems/rai ls-2.3.8/lib/initializer.rb:411:ineach’
from
/home/slugs/1e63ec9f-b582-4585-b5ae-5fafc992e826/mnt/.gems/gems/rai
ls-2.3.8/lib/initializer.rb:411:in load_application_classes' from /home/slugs/1e63ec9f-b582-4585-b5ae-5fafc992e826/mnt/.gems/gems/rai ls-2.3.8/lib/initializer.rb:197:inprocess’
from
/home/slugs/1e63ec9f-b582-4585-b5ae-5fafc992e826/mnt/.gems/gems/rai
ls-2.3.8/lib/initializer.rb:113:in send' from /home/slugs/1e63ec9f-b582-4585-b5ae-5fafc992e826/mnt/.gems/gems/rai ls-2.3.8/lib/initializer.rb:113:inrun’
from
/disk1/home/slugs/1e63ec9f-b582-4585-b5ae-5fafc992e826/mnt/config/e
nvironment.rb:9
from
/usr/ruby1.8.7/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31
:in gem_original_require' from /usr/ruby1.8.7/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31 :inrequire’
from
/usr/ruby1.8.7/lib/ruby/gems/1.8/gems/thin-1.2.6/lib/rack/adapter/r
ails.rb:42:in load_application' from /usr/ruby1.8.7/lib/ruby/gems/1.8/gems/thin-1.2.6/lib/rack/adapter/r ails.rb:23:ininitialize’
from /home/heroku_rack/heroku.ru:29:in new' from /home/heroku_rack/heroku.ru:29 from /home/slugs/1e63ec9f-b582-4585-b5ae-5fafc992e826/mnt/.gems/gems/rac k-1.1.0/lib/rack/builder.rb:46:ininstance_eval’
from
/home/slugs/1e63ec9f-b582-4585-b5ae-5fafc992e826/mnt/.gems/gems/rac
k-1.1.0/lib/rack/builder.rb:46:in initialize' from /home/slugs/1e63ec9f-b582-4585-b5ae-5fafc992e826/mnt/.gems/gems/rac k-1.1.0/lib/rack/builder.rb:63:innew’
from
/home/slugs/1e63ec9f-b582-4585-b5ae-5fafc992e826/mnt/.gems/gems/rac
k-1.1.0/lib/rack/builder.rb:63:in map' from /home/heroku_rack/heroku.ru:18 from /home/slugs/1e63ec9f-b582-4585-b5ae-5fafc992e826/mnt/.gems/gems/rac k-1.1.0/lib/rack/builder.rb:46:ininstance_eval’
from
/home/slugs/1e63ec9f-b582-4585-b5ae-5fafc992e826/mnt/.gems/gems/rac
k-1.1.0/lib/rack/builder.rb:46:in initialize' from /home/heroku_rack/heroku.ru:11:innew’
from /home/heroku_rack/heroku.ru:11
from
/home/slugs/1e63ec9f-b582-4585-b5ae-5fafc992e826/mnt/.gems/gems/rac
k-1.1.0/lib/rack/builder.rb:46:in instance_eval' from /home/slugs/1e63ec9f-b582-4585-b5ae-5fafc992e826/mnt/.gems/gems/rac k-1.1.0/lib/rack/builder.rb:46:ininitialize’
from /home/heroku_rack/heroku.ru:1:in `new’
from /home/heroku_rack/heroku.ru:1

-----> Your application crashed.

I am communicating with salesforce and it’s working fine on locally.

Please help me to figure out the above error.
Thanks in advance