Error in ROR App

hi all,
i am new to ROR,I have one ROR app developed in old version i upgrade
it with following version:
RubyGems Environment:
  - RUBYGEMS VERSION: 1.3.2
  - RUBY VERSION: 1.8.6 (2008-08-11 patchlevel 287) [i386-mswin32]
  - INSTALLATION DIRECTORY: D:/Ruby/lib/ruby/gems/1.8
  - RUBY EXECUTABLE: D:/Ruby/bin/ruby.exe
  - EXECUTABLE DIRECTORY: D:/Ruby/bin
  - RUBYGEMS PLATFORMS:
    - ruby
    - x86-mswin32-60
  - GEM PATHS:
     - D:/Ruby/lib/ruby/gems/1.8
     - D:/Documents and Settings/Administrator/.gem/ruby/1.8
  - GEM CONFIGURATION:
     - :update_sources => true
     - :verbose => true
     - :benchmark => false
     - :backtrace => false
     - :bulk_threshold => 1000
  - REMOTE SOURCES:
     - http://gems.rubyforge.org/

Rail version:2.3.4
ruby 1.8.6 (2008-08-11 patchlevel 287) [i386-mswin32]
With MySql version: 5.0.27

for this configration my server starts,but when i type app url in
browser end enter it shows following error
i don't know what is issue:-
#<Errno::ECONNABORTED: An established connection was aborted by the
software in your host machine.>
D:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/lib/
mongrel/http_response.rb:137:in `write'
D:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/lib/
mongrel/http_response.rb:137:in `write'
D:/Ruby/lib/ruby/gems/1.8/gems/rack-1.0.0/lib/rack/handler/mongrel.rb:
75:in `process'
D:/Ruby/lib/ruby/gems/1.8/gems/rack-1.0.0/lib/rack/file.rb:83:in
`each'
D:/Ruby/lib/ruby/gems/1.8/gems/rack-1.0.0/lib/rack/file.rb:81:in
`open'
D:/Ruby/lib/ruby/gems/1.8/gems/rack-1.0.0/lib/rack/file.rb:81:in
`each'
D:/Ruby/lib/ruby/gems/1.8/gems/rack-1.0.0/lib/rack/handler/mongrel.rb:
74:in `process'
D:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/lib/
mongrel.rb:159:in `process_client'
D:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/lib/
mongrel.rb:158:in `each'
D:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/lib/
mongrel.rb:158:in `process_client'
D:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/lib/
mongrel.rb:285:in `run'
D:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/lib/
mongrel.rb:285:in `initialize'
D:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/lib/
mongrel.rb:285:in `new'
D:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/lib/
mongrel.rb:285:in `run'
D:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/lib/
mongrel.rb:268:in `initialize'
D:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/lib/
mongrel.rb:268:in `new'
D:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/lib/
mongrel.rb:268:in `run'
D:/Ruby/lib/ruby/gems/1.8/gems/rack-1.0.0/lib/rack/handler/mongrel.rb:
34:in `run'
D:/Ruby/lib/ruby/gems/1.8/gems/rails-2.3.4/lib/commands/server.rb:111
D:/Ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in
`gem_original_require'
D:/Ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in
`require'
./script/server:4
-e:2:in `load'
-e:2

Please help me to resolved this issue.

hi all,
i am new to ROR,I have one ROR app developed in old version i upgrade
it with following version:
RubyGems Environment:
- RUBYGEMS VERSION: 1.3.2
- RUBY VERSION: 1.8.6 (2008-08-11 patchlevel 287) [i386-mswin32]

Did you upgrade to that version of Ruby?

Rail version:2.3.4
ruby 1.8.6 (2008-08-11 patchlevel 287) [i386-mswin32]
With MySql version: 5.0.27

for this configration my server starts,but when i type app url in
browser end enter it shows following error
i don't know what is issue:-
#<Errno::ECONNABORTED: An established connection was aborted by the
software in your host machine.>

When you requested a page you aborted it for full rendering, thus, the
request was triggered by the web server couldn't deliver to the
client.

Also, did you check your firewall settings just in case?