site5 uninitialized constant NameError

Hi everyone, I just trying to migrate/upload my application to site5
server and I had this error and have no idea where should be or why
because in my computer doesn't give this error. Maybe because they use
apache or something like that.

These are the possible causes:
There may be a syntax error in the application's code. Please check
for such errors and fix them.
A required library may not installed. Please install all libraries
that this application requires.
The application may not be properly configured. Please check whether
all configuration files are written correctly, fix any incorrect
configurations, and restart this application.
A service that the application relies on (such as the database server
or the Ferret search engine server) may not have been started. Please
start that service.
Further information about the error may have been written to the
application's log file. Please check it in order to analyse the
problem.

Error message:
uninitialized constant ExampleName

Exception class:
NameError

Application root:
/home/example

Backtrace:
# File Line Location
0 config.ru 4
1 /home/brokerga/example/vendor/bundle/ruby/1.8/gems/rack-1.3.6/lib/
rack/builder.rb 51 in `instance_eval'
2 /home/brokerga/example/vendor/bundle/ruby/1.8/gems/rack-1.3.6/lib/
rack/builder.rb 51 in `initialize'
3 config.ru 1 in `new'
4 config.ru 1