AspNetCore RC2 ERR_CONNECTION_REFUSED

Hi all, I faced some problems using AspNetCore RC2. I totally cannot run web application and getting ERR_CONNECTION_REFUSED.

I already tried changing port in application properties but no luck.

here is my project.json

{"title": "FOCUS HEALTH INC","version": "1.0.0-1","copyright": "Frog.Inc","description": "ERP","language": "en","dependencies": {"FHIRC2.Data": "1.0.0-*","FHIRC2.Domain": "1.0.0-*","Microsoft.AspNetCore.Diagnostics": "1.0.0-rc2-final","Microsoft.AspNetCore.Mvc": "1.0.0-rc2-final","Microsoft.AspNetCore.Server.IISIntegration": "1.0.0-rc2-final","Microsoft.AspNetCore.Server.Kestrel": "1.0.0-rc2-final","Microsoft.AspNetCore.StaticFiles": "1.0.0-rc2-final","Microsoft.Extensions.Logging.Console": "1.0.0-rc2-final","Microsoft.NETCore.App": {"version": "1.0.0-rc2-3002702","type": "platform"
    }
  },"tools": {"Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.0.0-preview2-final"
  },"frameworks": {"netcoreapp1.0": {"imports": ["dotnet5.6","portable-net45+win8"
      ]
    }
  },"buildOptions": {"emitEntryPoint": true,"preserveCompilationContext": true
  },"runtimeOptions": {"configProperties": {"System.GC.Server": true
    }
  },"publishOptions": {"include": ["wwwroot","web.config"
    ]
  },"scripts": {"postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
  }
}

the following is my web.config

<?xml version="1.0" encoding="utf-8"?><configuration><!--
    Configure your application settings in appsettings.json. Learn more at http://go.microsoft.com/fwlink/?LinkId=786380
  --><system.webServer><handlers><add name="aspNetCore" path="*" verb="*" modules="AspNetCoreModule" resourceType="Unspecified"/></handlers><aspNetCore processPath="%LAUNCHER_PATH%" arguments="%LAUNCHER_ARGS%" stdoutLogEnabled="false" stdoutLogFile=".\logs\stdout" forwardWindowsAuthToken="false"/></system.webServer></configuration>

What do I miss out? Thanks for any suggestion.