Load error shown when I require 'symengine'

load_error

abinashmeher999@JARVIS:~$ irb
2.2.0 :001 > require 'symengine'
LoadError: cannot load such file -- symengine/symengine
	from /home/abinashmeher999/.rvm/rubies/ruby-2.2.0/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	from /home/abinashmeher999/.rvm/rubies/ruby-2.2.0/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	from /home/abinashmeher999/.rvm/gems/ruby-2.2.0/gems/symengine-0.0.0.pre/lib/symengine.rb:1:in `<top (required)>'
	from /home/abinashmeher999/.rvm/rubies/ruby-2.2.0/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:128:in `require'
	from /home/abinashmeher999/.rvm/rubies/ruby-2.2.0/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:128:in `rescue in require'
	from /home/abinashmeher999/.rvm/rubies/ruby-2.2.0/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:39:in `require'
	from (irb):1
	from /home/abinashmeher999/.rvm/rubies/ruby-2.2.0/bin/irb:11:in `<main>'
2.2.0 :002 >

My symengine.rb file looks like this

require 'symengine/symengine'

module SymEngine
  def SymEngine.ascii_art
    puts "
 _____           _____         _         
|   __|_ _ _____|   __|___ ___|_|___ ___ 
|__   | | |     |   __|   | . | |   | -_|
|_____|_  |_|_|_|_____|_|_|_  |_|_|_|___|
      |___|               |___|          "
  end
end