Rails on IIS Web.config

gistfile1.xml

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
  <system.webServer>
    <handlers>
      <add name="httpplatformhandler" path="*" verb="*"
        modules="httpPlatformHandler"
        resourceType="Unspecified" requireAccess="Script" />
    </handlers>
    <httpPlatform stdoutLogEnabled="true"
      startupTimeLimit="20"
      processPath="C:\Ruby21\bin\ruby.exe"
      arguments="C:\inetpub\wwwroot\rails_on_iis\bin\rails server -p %HTTP_PLATFORM_PORT% -b 127.0.0.1 -e production">
    </httpPlatform>
  </system.webServer>
</configuration>